The impact of reduced routine community mental healthcare on people from minority ethnic groups during the COVID-19 pandemic: qualitative study of stakeholder perspectives.

BACKGROUND: Enduring ethnic inequalities exist in mental healthcare. The COVID-19 pandemic has widened these. AIMS: To explore stakeholder perspectives on how the COVID-19 pandemic has increased ethnic inequalities in mental healthcare. METHOD: A qualitative interview study of four areas in England with 34 patients, 15 carers and 39 mental health professionals from National Health Service (NHS) and community organisations (July 2021 to July 2022). Framework analysis was used to develop a logic model of inter-relationships between pre-pandemic barriers and COVID-19 impacts. RESULTS: Impacts were largely similar across sites, with some small variations (e.g. positive service impacts of higher ethnic diversity in area 2). Pre-pandemic barriers at individual level included mistrust and thus avoidance of services and at a service level included the dominance of a monocultural model, leading to poor communication, disengagement and alienation. During the pandemic remote service delivery, closure of community organisations and media scapegoating exacerbated existing barriers by worsening alienation and communication barriers, fuelling prejudice and division, and increasing mistrust in services. Some minority ethnic patients reported positive developments, experiencing empowerment through self-determination and creative activities. CONCLUSIONS: During the COVID-19 pandemic some patients showed resilience and developed adaptations that could be nurtured by services. However, there has been a reduction in the availability of group-specific NHS and third-sector services in the community, exacerbating pre-existing barriers. As these developments are likely to have long-term consequences for minority ethnic groups' engagement with mental healthcare, they need to be addressed as a priority by the NHS and its partners.

Just a story? Leadership, lived experience and integrated care.

BACKGROUND: Integrated care is based around values of involvement and shared decision-making, but these are not often reflected within planning and implementation. Barriers include continued emphasis on professional and managerial perspectives, skills gaps on how best to engage people and communities and insufficient investment in involvement infrastructure. Despite such challenges, people with lived experience have still led changes in policy and services. DESIGN: Qualitative study involving 25 participants with lived experience from 12 countries. Participants shared their background stories and engaged in semistructured interviews relating to leadership identity, experience of influencing and personal learning. Transcripts were analysed through a framework approach informed by narrative principles. RESULTS: Participants were motivated by their own experiences and a wish to improve care for future individuals and communities. Sharing their story was often the entry point for such influencing. Participants gained skills and confidence in story telling despite a lack of support and development. Many felt comfortable being described as a leader while others rejected this identity and preferred a different title. No common alternative term to leader was identified. Influencing services required considerable personal cost but also led to new networks, skills development and satisfaction when change was achieved. DISCUSSION: Leadership within integrated care is often awarded to those with structural power related to management or clinical seniority. People with lived experience are though uniquely placed to identify what needs to change and can develop inspiring visions based around their personal stories. Claiming identity as leader can be challenging due to traditional notions of who is eligible to lead and unwillingness by professionals and managers to grant such identity. CONCLUSIONS: People with lived experience should be recognised as leaders of integrated care and have access to developmental opportunities and practical support to strengthen their skills, including that of storytelling. PATIENT AND PUBLIC CONTRIBUTION: The research was instigated on the request of a community advisory board of people with lived experience who shaped its design, contributed to the analysis and informed the conclusions and implications.

AAPM medical physics practice guideline 13.a: HDR brachytherapy, part A.

The American Association of Physicists in Medicine (AAPM) is a nonprofit professional society whose primary purposes are to advance the science, education, and professional practice of medical physics. The AAPM has more than 8000 members and is the principal organization of medical physicists in the United States. The AAPM will periodically define new practice guidelines for medical physics practice to help advance the science of medical physics and to improve the quality of service to patients throughout the United States. Existing medical physics practice guidelines (MPPGs) will be reviewed for the purpose of revision or renewal, as appropriate, on their fifth anniversary or sooner. Each medical physics practice guideline represents a policy statement by the AAPM, has undergone a thorough consensus process in which it has been subjected to extensive review, and requires the approval of the Professional Council. The medical physics practice guidelines recognize that the safe and effective use of diagnostic and therapeutic radiology requires specific training, skills, and techniques, as described in each document. Reproduction or modification of the published practice guidelines and technical standards by those entities not providing these services is not authorized. The following terms are used in the AAPM practice guidelines: (1) Must and must not: Used to indicate that adherence to the recommendation is considered necessary to conform to this practice guideline. (2) Should and should not: Used to indicate a prudent practice to which exceptions may occasionally be made in appropriate circumstances. Approved by AAPM's Executive Committee April 28, 2022.

AAPM Medical physics practice guideline 15.A: Peer review in clinical physics.

The American Association of Physicists in Medicine (AAPM) is a nonprofit professional society whose primary purposes are to advance the science, education, and professional practice of medical physics. The AAPM has more than 8000 members and is the principal organization of medical physicists in the United States. The AAPM will periodically define new practice guidelines for medical physics practice to help advance the science of medical physics and to improve the quality of service to patients throughout the United States. Existing medical physics practice guidelines will be reviewed for the purpose of revision or renewal, as appropriate, on their fifth anniversary or sooner. Each medical physics practice guideline represents a policy statement by the AAPM, has undergone a thorough consensus process in which it has been subjected to extensive review, and requires the approval of the Professional Council. The medical physics practice guidelines recognize that the safe and effective use of diagnostic and therapeutic radiology requires specific training, skills, and techniques, as described in each document. Reproduction or modification of the published practice guidelines and technical standards by those entities not providing these services is not authorized. The following terms are used in the AAPM practice guidelines: Must and Must Not: Used to indicate that adherence to the recommendation is considered necessary to conform to this practice guideline. While must is the term to be used in the guidelines, if an entity that adopts the guideline has shall as the preferred term, the AAPM considers that must and shall have the same meaning. Should and Should Not: Used to indicate a prudent practice to which exceptions may occasionally be made in appropriate circumstances.

Effects of universal critical CHD screening of neonates at a mid-sized California congenital cardiac surgery centre.

INTRODUCTION: CHD affects over 1 million children in the United States. Studies show decreased mortality from CHD with newborn cardiac screening. California began a screening programme on 1 July, 2013. We evaluated the effect of mandatory screening on surgical outcomes at Loma Linda University Children's Hospital since 1 July, 2013. METHODS: We evaluated all infants having congenital heart surgery at Loma Linda University Children's Hospital between 1 July, 2013 and 31 December, 2018. Primary target diagnoses include hypoplastic left heart syndrome, pulmonary atresia with intact ventricular septum, tetralogy of Fallot, total anomalous pulmonary venous return, transposition of the great arteries, tricuspid atresia, and truncus arteriosus. Secondary target diagnoses include aortic coarctation, double outlet right ventricle, Ebstein anomaly, interrupted aortic arch, and single ventricle. Patients were stratified by timing of diagnosis (pre-screen, screen positive, and screen negative). Primary end points were post-operative length of stay, operative mortality, absolute mortality, and actuarial survival. RESULTS: The cohort included 274 infants. Of these, 79% were diagnosed prior to screening (46% prenatally). Only 38% of those screened were positive, with 13% of the cohort having a "missed diagnosis." CONCLUSIONS: Primary targets were more likely to be diagnosed by screening (53%), while secondary targets were unlikely to be diagnosed by screening (10%) (p = 0.004). Outcomes such as length of stay, operative mortality, and actuarial survival were not different based on timing of diagnosis (p > 0.05). Despite late diagnosis, those not diagnosed until after screening did not have adverse outcomes.

Breaking Down Barriers to HIV Care for Gay and Bisexual Men and Transgender Women: The Advocacy and Other Community Tactics (ACT) Project.

Despite the prevailing consensus on the role that stigma and discrimination play in limiting access to HIV prevention technology, discouraging HIV testing, and impeding access to HIV care, studies that focus on structural interventions to address stigma and discrimination for gay, bisexual, and other men who have sex with men and transgender women are surprisingly uncommon. We aimed to identify the outcomes from a coordinated set of community-led advocacy initiatives targeting structural changes that might eliminate barriers to HIV care for gay and bisexual men and transgender women in five African and two Caribbean countries. We conducted a prospective evaluation that included repeated site visits and in-depth semi-structured interviews with 112 people with direct knowledge of project activities, accomplishments, failures, and challenges. Using outcome harvesting and qualitative analysis methods, we observed that over the 18-month implementation period, local advocacy efforts contributed to enhanced political will on the part of duty bearers for ensuring equitable access to HIV care, increases in the availability of affirming resources, improved access to existing resources, and changes in normative institutional practices to enable access to HIV care. Evidence on Project ACT points to the vital role community-led advocacy plays in addressing stigma and discrimination as structural barriers to HIV care.

RESUMEN: Estudios cual centran en intervenciones estructurales para abordar el estigma y la discriminación de los hombres gay, bisexuales y otros hombres que tienen sexo con hombres y mujeres transgénero son sorprendentemente poco comunes, a pesar del consenso prevaleciente sobre el rol que desempeñan el estigma y la discriminación al limitar el acceso a la tecnología de prevención del VIH, desalentar las pruebas del VIH e impedir el acceso a la atención del VIH. Nuestro objetivo era identificar los resultados de un conjunto coordinado de iniciativas de incidencia política dirigidas por la comunidad que apuntan a cambios estructurales que podrían eliminar las barreras a la atención del VIH para hombres gay y bisexuales y mujeres transgénero en cinco países de África y dos del Caribe. Realizamos una evaluación prospectiva que incluyó visitas repetidas al sitio y entrevistas profundas semiestructuradas con 112 personas con conocimiento directo de las actividades, logros, fracasos y desafíos del proyecto. Utilizando métodos de recolección de resultados y análisis cualitativo, observamos que durante el período de implementación de 18 meses, los esfuerzos de promoción local contribuyeron a una mayor voluntad política por parte de los titulares de deberes para garantizar el acceso equitativo a la atención del VIH, aumentos en la disponibilidad de recursos afirmativos, mejoras al acceso a los recursos existentes y cambios en las prácticas institucionales normativas para permitir el acceso a la atención del VIH. La evidencia sobre el Proyecto ACT apunta al papel vital que desempeñan las iniciativas de incidencia política liderada por la comunidad para abordar el estigma y la discriminación como barreras estructurales para la atención del VIH.

Monitoring retinal pathology and cerebral injury in sickle cell disease using spectral-domain optical coherence tomography in pediatric patients.

PURPOSE: This study aimed to confirm the correlation between sickle cell disease (SCD) genotype and retinal damage identified by spectral-domain optical coherence tomography (SD-OCT), and examine a potential link between hypoxic ischemic injury in the retina and brain. METHODS: In this prospective, observational case series, 117 patients (56 males) aged 5-20 years with SCD (36 SC, 68 SS, eight Sß+ thalassemia, five Sß0 thalassemia) underwent ophthalmologic examination including funduscopy and SD-OCT imaging. Comparison of SCD genotypes and association between ocular findings and cerebrovascular disease (CVD) in subjects with SS/Sß0 genotype were investigated. RESULTS: Visual acuity ranged from 20/20 to 20/40. On funduscopic exam, 16 of 117 (13.7%) had retinopathy; 69 of 117 (59.0%) showed inner retina thinning on SD-OCT. Patients with SS/Sß0 showed a higher frequency of sickle cell retinopathy (SCR) change (68.5% vs. 47.2%), bilateral SCR (49.9% vs. 25.0%), and foveal involvement (15.1% vs. 0) than the SC genotype. While funduscopic findings in our cohort with SS/Sß0 genotype showed no correlation with CVD, 20 of 21 patients with CVD had abnormal SD-OCT. Elevated reticulocyte percentage and aspartate aminotransferase are associated with SD-OCT changes and CVD. CONCLUSIONS: SD-OCT was better than funduscopy in detecting retinal changes, higher frequency, and more extensive retinal changes in the more severe SCD genotypes SS and Sß0 as compared with SC. The correlation between abnormal SD-OCT and CVD strongly suggests that retinal exam using SD-OCT may aid in detection and monitoring SCD-related CVD. Retinopathy may be another component of the hemolytic subphenotype of SCD.

Gendered powerlessness in at-risk adolescent and young women: an empirical model.

In the United States, youth aged 13-24 comprised approximately 21% of new HIV infections in 2017; 13% of these infections occurred among women, the majority of whom (86%) acquired HIV through heterosexual contact (Centers for Disease Control and Prevention. 2019a. HIV and youth. Retrieved from https://www.cdc.gov/hiv/group/age/youth/index.html, Centers for Disease Control and Prevention. 2019b. HIV among women. Retrieved from https://www.cdc.gov/hiv/group/gender/women/index.html). We fit and validated a developmentally appropriate empirical model of Connell's Theory of Gender and Power (Connell, R. W. 1987. Gender and power: Society, the person and sexual politics. Stanford, CA: Stanford University Press, Connell, R. W. 2013. Gender and power: Society, the person and sexual politics. Hoboken, NJ: John Wiley & Sons) in a sample of young women and assessed whether gendered powerlessness reflected a multidimensional higher-order latent factor, as the theory implies. Anonymous computer-assisted interviews were administered to at-risk, sexually active young women (N = 1,101). Factor analyses and structural equation modeling were used to determine the dimensionality of gendered powerlessness. Associations with condom use were examined to validate the model. We fit a three-component model of gendered powerlessness, but not a higher-order latent factor. We observed that high scores on two dimensions of gendered powerlessness - cathexis and sexual division of power - were associated with lower likelihood of condom use. Our three-component model helps elucidate the role that components of gendered powerlessness play in young women's health behaviors and underscores the need for measures tailored to young women at high risk of contracting HIV.

Family Resilience From the Perspective of Caregivers of Youth With Sickle Cell Disease.

Families coping with sickle cell disease (SCD) often face heightened psychosocial risk factors, and research in pediatric SCD has often focused more on this area than resiliency factors. The aim of this study was to gain a better understanding of family resiliency in SCD based on caregiver perspectives. A secondary qualitative analysis was conducted with data from a mixed-methods study of caregivers of youth with SCD (n=22). Qualitative analyses involved coding based on 2 resiliency frameworks, organizing coding categories into themes, and systematically reintegrating these themes into a conceptualization that reflected family resiliency. Themes aligned well with the resiliency frameworks and related to family belief systems and meaning-making around SCD (acceptance of SCD, positive attitude, religious faith), family organization and adaptation (flexibility, stability, social supports), and the importance of communication and problem-solving. Study findings emphasize the importance of assessing resilience in families of youth with SCD and suggest the potential clinical benefits of developing psychosocial interventions based on family strengths.

Psychosocial Screening in Sickle Cell Disease: Validation of the Psychosocial Assessment Tool.

OBJECTIVE: Families of youth with Sickle Cell Disease (SCD) can face psychosocial adversity including emotional distress, functional impairments, and sociodemographic risk factors. Systematic screening of psychosocial risk can identify families who may benefit from further assessment and evidence-based care. The Psychosocial Assessment Tool (PAT) is a brief caregiver-report screener based on the tri-level Pediatric Psychosocial Preventative Health Model (PPPHM). METHODS: Findings are presented from the baseline assessment of a longitudinal study validating a Sickle Cell version of the PAT 2.0. Primary caregivers of 136 youth with SCD receiving care through a multidisciplinary SCD clinic in a children's hospital completed the PAT and validation measures. A subset of 25 caregivers completed the PAT a second time within 3-5 weeks. RESULTS: Internal consistency for the total score was strong (α = .87), and for the subscales was moderate to strong (α = .74-.94), with the exception of the Family Structure (α = .38), Caregiver Beliefs (α = .48), and Stress Reactions (α = .56) subscales. Test-retest reliability was also strong (r = .86, p < .001). Moderate to strong correlations with all except two criteria measures provided validation for the total and subscale scores. Validation measures varied significantly across the three levels of the PPPHM. CONCLUSIONS: Results provide support for the reliability and validity of the PAT in SCD. Systematic screening with the PAT can help identify families of youth with SCD at risk for psychosocial problems and potentially help connect them to appropriate services.

Quantitative sensory testing in children with sickle cell disease: additional insights and future possibilities.

Quantitative sensory testing (QST) is used in a variety of pain disorders to characterize pain and predict prognosis and response to specific therapies. In this study, we aimed to confirm results in the literature documenting altered QST thresholds in sickle cell disease (SCD) and assess the test-retest reliability of results over time. Fifty-seven SCD and 60 control subjects aged 8-20 years underwent heat and cold detection and pain threshold testing using a Medoc TSAII. Participants were tested at baseline and 3 months; SCD subjects were additionally tested at 6 months. An important facet of our study was the development and use of a novel QST modelling approach, allowing us to model all data together across modalities. We have not demonstrated significant differences in thermal thresholds between subjects with SCD and controls. Thermal thresholds were consistent over a 3- to 6-month period. Subjects on whom hydroxycarbamide (HC) was initiated shortly before or after baseline testing (new HC users) exhibited progressive decreases in thermal sensitivity from baseline to 6 months, suggesting that thermal testing may be sensitive to effective therapy to prevent vasoocclusive pain. These findings inform the use of QST as an endpoint in the evaluation of preventative pain therapies.

Improving Timely Linkage to Care among Newly Diagnosed HIV-Infected Youth: Results of SMILE.

Delayed linkage to care deprives youth living with HIV of the benefits of HIV treatment and risks increased HIV transmission. Developing and testing linkage-to-care models that are capable of simultaneously addressing structural and individual obstacles are necessary to attain national goals for timely linkage of newly diagnosed youth to care. We assessed an integrated, multi-pronged strategy for improving youth's timely linkage to care carried out in eight adolescent medicine clinical trials units (AMTUs) in the USA. In phase I, the intervention strategy paired intensive medical case management with formalized relationships to local health departments, including granting of public health authority (PHA) to four of the AMTUs. In phase II, local coalitions run by the AMTUs to address structural changes to meet youth's HIV prevention and HIV testing needs began to advocate for local structural changes to improve timely access to care. Results of an ARIMA model demonstrated sustained decline in the average number of days to link to care over a 6-year period (ARIMA (1,2,1) AIC = 245.74, BIC = 248.70, p < .01)). By the end of the study, approximately 90% of youth linked to care had an initial medical visit in 42 or fewer days post-diagnosis. PHA improved the timeliness of linkage to care (b = - 69.56, p < .05). A piecewise regression suggested the addition of structural change initiatives during phase II made a statistically significant contribution to reducing time to linkage over and above achievements attained via case management alone (F (3,19) = 5.48, p < .01; Adj. R2 = .3794). Multi-level linkage-to-care interventions show promise for improving youth's timely access to HIV medical care.

The moderating role of resilience resources in the association between crime exposure and substance use among young sexual minority men.

Objectives: Substance use is prevalent among young sexual minority men and crime exposure is linked with adverse health behaviors. Guided by the protective model of resilience, we examined the impact of crime exposure and resilience resources on substance use behaviors, and whether resilience moderated associations between crime exposure and substance use behaviors. Methods: A cross-sectional sample of young sexual minority men (n = 720) ages 15-24 participated in a one-time survey conducted in seven cities across the United States. Participants' mean age was 21.2 years; 50% self-identified as Black, and 66% self-identified as gay. Participants self-reported on sociodemographic factors, crime exposure, resilience resources, and substance use behaviors. We fit generalized estimating models to examine associations between crime exposure, resilience resources, and the interaction between crime exposure and resilience resources on substance use behaviors. Results: Overall, 31% reported heavy alcohol use, 54% monthly marijuana use, 14% drug use, and 26% reported being a victim of a crime. Crime exposure was associated with an increased odds of alcohol (AOR = 1.45, 95%CI: 1.02, 2.14), marijuana (AOR = 1.41, 95%CI: 1.07, 2.04), and drug use (AOR = 1.94, 95%CI: 1.14, 2.98). Resilience resources were associated with a reduced odds of alcohol use (AOR = 0.66, 95%CI: 0.47, 0.93), marijuana use (AOR = 0.82, 95%CI: 0.60, 0.98), and drug use (AOR = 0.85, 95%CI: 0.54, 0.96). There was a significant interaction such that resilience resources reduced associations between crime exposure and alcohol and drug use. Conclusions: Findings support the protective effects of resilience resources for young sexual minority men. Results highlight the importance of ensuring the availability of community resources to meet the needs of sexual minority youth.

Anticipated HIV Stigma and Delays in Regular HIV Testing Behaviors Among Sexually-Active Young Gay, Bisexual, and Other Men Who Have Sex with Men and Transgender Women.

Young gay, bisexual and other men who have sex with men (YGBMSM) and young transgender women are disproportionately affected by HIV/AIDS. The success of biomedical prevention strategies is predicated on regular HIV testing; however, there has been limited uptake of testing among YGBMSM and young transgender women. Anticipated HIV stigma-expecting rejection as a result of seroconversion- may serve as a significant barrier to testing. A cross-sectional sample of YGBMSM (n = 719, 95.5%) and young transgender women (n = 33, 4.4%) ages 15-24 were recruited to participate in a one-time survey. Approximately one-third of youth had not tested within the last 6 months. In a multivariable model, anticipated HIV stigma and reporting a non-gay identity were associated with an increased odds of delaying regular HIV testing. Future research and interventions are warranted to address HIV stigma, in order to increase regular HIV testing among YGBMSM and transgender women.

Structural Effects on HIV Risk Among Youth: A Multi-level Analysis.

We proposed a multilevel model of structural influences on HIV-risky sexual partnerships in a diverse sample of 1793 youth residing in 23 states and the District of Columbia. We examined the influence of concentrated disadvantage, HIV stigma, and sexual and gender minority stigma on engagement in HIV risky sexual partnerships and whether youth's participation in opportunity structures, anticipation of HIV stigma, and perceptions of their community as youth-supportive settings mediated structural effects. After controlling for age, HIV status, and race, we found structural HIV stigma had deleterious indirect effects on youth's participation in HIV-risky sexual partnerships. Concentrated disadvantage and structural sexual and gender minority stigma had direct negative effects on youth's perceptions of their communities as supportive and on their participation in prosocial activity. Support perceptions had direct, protective effects on avoidance of HIV-risky sexual partnerships. Structural stigma undermines youth's belief that their communities invest in their safety and well-being.

Role of Shellfish Aquaculture in the Reduction of Eutrophication in an Urban Estuary.

Land-based management has reduced nutrient discharges; however, many coastal waterbodies remain impaired. Oyster "bioextraction" of nutrients and how oyster aquaculture might complement existing management measures in urban estuaries was examined in Long Island Sound, Connecticut. Eutrophication status, nutrient removal, and ecosystem service values were estimated using eutrophication, circulation, local- and ecosystem-scale models, and an avoided-costs valuation. System-scale modeling estimated that 1.31% and 2.68% of incoming nutrients could be removed by current and expanded production, respectively. Up-scaled local-scale results were similar to system-scale results, suggesting that this up-scaling method could be useful in bodies of water without circulation models. The value of removed nitrogen was estimated using alternative management costs (e.g., wastewater treatment) as representative, showing ecosystem service values of $8.5 and $470 million per year for current and maximum expanded production, respectively. These estimates are conservative; removal by clams in Connecticut, oysters and clams in New York, and denitrification are not included. Optimistically, the calculation of oyster-associated removal from all leases in both states (5% of bottom area) plus denitrification losses showed increases to 10%-30% of annual inputs, which would be higher if clams were included. Results are specific to Long Island Sound, but the approach is transferable to other urban estuaries.

A deep sequencing approach to estimate Plasmodium falciparum complexity of infection (COI) and explore apical membrane antigen 1 diversity.

BACKGROUND: Humans living in regions with high falciparum malaria transmission intensity harbour multi-strain infections comprised of several genetically distinct malaria haplotypes. The number of distinct malaria parasite haplotypes identified from an infected human host at a given time is referred to as the complexity of infection (COI). In this study, an amplicon-based deep sequencing method targeting the Plasmodium falciparum apical membrane antigen 1 (pfama1) was utilized to (1) investigate the relationship between P. falciparum prevalence and COI, (2) to explore the population genetic structure of P. falciparum parasites from malaria asymptomatic individuals participating in the 2007 Demographic and Health Survey (DHS) in the Democratic Republic of Congo (DRC), and (3) to explore selection pressures on geospatially divergent parasite populations by comparing AMA1 amino acid frequencies in the DRC and Mali. RESULTS: A total of 900 P. falciparum infections across 11 DRC provinces were examined. Deep sequencing of both individuals, for COI analysis, and pools of individuals, to examine population structure, identified 77 unique pfama1 haplotypes. The majority of individual infections (64.5%) contained polyclonal (COI > 1) malaria infections based on the presence of genetically distinct pfama1 haplotypes. A minimal correlation between COI and malaria prevalence as determined by sensitive real-time PCR was identified. Population genetic analyses revealed extensive haplotype diversity, the vast majority of which was shared across the sites. AMA1 amino acid frequencies were similar between parasite populations in the DRC and Mali. CONCLUSIONS: Amplicon-based deep sequencing is a useful tool for the detection of multi-strain infections that can aid in the understanding of antigen heterogeneity of potential malaria vaccine candidates, population genetics of malaria parasites, and factors that influence complex, polyclonal malaria infections. While AMA1 and other diverse markers under balancing selection may perform well for understanding COI, they may offer little geographic or temporal discrimination between parasite populations.

Posterior Reversible Encephalopathy Syndrome and Cerebral Sinus Thrombosis in a Case of Pediatric B-Cell ALL.

Posterior reversible encephalopathy syndrome (PRES) and cerebral sinus thrombosis are 2 known complications of acute lymphoblastic leukemia and its treatment. We describe a patient with acute lymphoblastic leukemia whose course was complicated by both of these conditions. This case is novel both for the fact that PRES developed before the initiation of therapy and that PRES was followed shortly by the development of cerebral sinus thrombosis. Our patient's story raises questions about our current understanding of the pathophysiology of PRES, and it suggests that PRES may actually be a predisposing risk factor for cerebral sinus thrombosis.

AAPM Medical Physics Practice Guideline 8.a.: Linear accelerator performance tests.

PURPOSE: The purpose of this guideline is to provide a list of critical performance tests in order to assist the Qualified Medical Physicist (QMP) in establishing and maintaining a safe and effective quality assurance (QA) program. The performance tests on a linear accelerator (linac) should be selected to fit the clinical patterns of use of the accelerator and care should be given to perform tests which are relevant to detecting errors related to the specific use of the accelerator. METHODS: A risk assessment was performed on tests from current task group reports on linac QA to highlight those tests that are most effective at maintaining safety and quality for the patient. Recommendations are made on the acquisition of reference or baseline data, the establishment of machine isocenter on a routine basis, basing performance tests on clinical use of the linac, working with vendors to establish QA tests and performing tests after maintenance. RESULTS: The recommended tests proposed in this guideline were chosen based on the results from the risk analysis and the consensus of the guideline's committee. The tests are grouped together by class of test (e.g., dosimetry, mechanical, etc.) and clinical parameter tested. Implementation notes are included for each test so that the QMP can understand the overall goal of each test. CONCLUSION: This guideline will assist the QMP in developing a comprehensive QA program for linacs in the external beam radiation therapy setting. The committee sought to prioritize tests by their implication on quality and patient safety. The QMP is ultimately responsible for implementing appropriate tests. In the spirit of the report from American Association of Physicists in Medicine Task Group 100, individual institutions are encouraged to analyze the risks involved in their own clinical practice and determine which performance tests are relevant in their own radiotherapy clinics.

Structural and Community Change Outcomes of the Connect-to-Protect Coalitions: Trials and Triumphs Securing Adolescent Access to HIV Prevention, Testing, and Medical Care.

Connect to Protect (C2P), a 10-year community mobilization effort, pursued the dual aims of creating communities competent to address youth's HIV-related risks and removing structural barriers to youth health. We used Community Coalition Action Theory (CCAT) to examine the perceived contributions and accomplishments of 14 C2P coalitions. We interviewed 318 key informants, including youth and community leaders, to identify the features of coalitions' context and operation that facilitated and undermined their ability to achieve structural change and build communities' capability to manage their local adolescent HIV epidemic effectively. We coded the interviews using an a priori coding scheme informed by CCAT and scholarship on AIDS-competent communities. We found community mobilization efforts like C2P can contribute to addressing the structural factors that promote HIV-risk among youth and to community development. We describe how coalition leadership, collaborative synergy, capacity building, and local community context influence coalitions' ability to successfully implement HIV-related structural change, demonstrating empirical support for many of CCAT's propositions. We discuss implications for how community mobilization efforts might succeed in laying the foundation for an AIDS-competent community.