Metal artifact reduction in computed tomography: Is it of benefit in evaluating sacroiliac joint fusion?

PURPOSE: The aim of this study was to compare image quality of computed tomography (CT) images with and without orthopedic metal artifact reduction (O-MAR) in the follow-up of patients after sacroiliac (SI) joint fusion. METHODS: Thirty-six consecutive patients (31 females and 5 males) undergoing CT within 24 h after SI joint fusion were included. CT images were reconstructed with and without O-MAR and scored by two radiologists with over 20 years of experience using a six-point ordinal scale. Images were scored on overall image quality and five criteria that are important to the clinician for the follow-up of patients after SI joint fusion. In addition, images were scored on how well four bony structures could be delineated. Wilcoxon signed-ranks tests with Holm-Bonferroni correction were used to test for differences between the radiologists' scores on CT images with and without O-MAR. RESULTS: Both radiologists scored overall image quality significantly higher (p < 0.05) on the images without O-MAR than on the images with O-MAR. In addition, two of the follow-up criteria, delineation of the sacrum and delineation of the implanted ilium were scored significantly higher (p < 0.05) on the images without O-MAR. Neither radiologist scored the images with O-MAR significantly higher than the images without O-MAR for any of the criteria. CONCLUSION: CT imaging without O-MAR provided higher image quality and better assessment of SI joint fusion follow-up criteria compared to CT imaging with O-MAR in the follow-up of patients after SI joint fusion.

Spinal cord injury and women's sexual life: case-control study.

Study design :This is a case-control study. OBJECTIVE: The objective of this study was to estimate the magnitude of association between spinal cord injury (SCI) and women's quality of sexual life and sexual function. SETTING: This study was conducted in the Brain and Spinal Cord Injury Research Center, Tehran University of Medical Sciences, Tehran, Iran. METHODS: From the referral university-based clinics, we used simple random sampling to recruit 62 women: 31 women with SCI and 31 women without SCI. Socio-demographic and reproductive traits questionnaire, Sexual Quality of life-Female (SQOL-F), Female Sexual Function Index (FSFI) and Spinal Cord Independence Measure (SCIM) were completed using telephone and face-to-face interviews in the cases and controls. After univariate analyses, multivariate linear and proportional odds regression models were conducted to investigate the relation between SCI and women's quality of sexual life, as well as sexual function. RESULTS: The mean age of cases and controls was 35.42±6.51 and 33.77±4.02 years. Most women were high school-educated and housewives. Adjusting for probable confounders, the proportional odds regression model showed a significant relationship between the spinal cord injury (AOR=4.2, 95% CI: 1.8-9.2), non-college-educated (AOR=3.1, 95% CI: 1.2-5.9) and employed (AOR=1.8, 95% CI: 1.1-1.8) variables and being in one of the moderate or poor quality of life classes. Scores of SQOL-F and FSFI domains, except satisfaction, were significantly worse in cases versus controls (P<0.001). CONCLUSION: Although our participants showed low sexual dysfunction, they tended to report moderate to poor quality of sexual life. Our findings support the implication that sexual rehabilitation must be provided for women with SCI soon after injury.

Patients with lichen sclerosus experience moderate satisfaction with treatment and impairment of quality of life: results of a cross-sectional study.

BACKGROUND: Although they are considered relevant, little is known about satisfaction with treatment and health-related quality of life (HRQoL) among patients with lichen sclerosus (LS). OBJECTIVES: In a cross-sectional study, we aimed to examine (i) satisfaction with treatment, (ii) patient characteristics associated with satisfaction and (iii) HRQoL in Dutch patients with LS. METHODS: Members of the Dutch LS Patient Association (n = 750) were invited to complete a web-based survey. We measured satisfaction with treatment with a study-specific questionnaire, and HRQoL with the Skindex-29. We calculated domain scores for symptoms, emotions and functioning, and categorized scores into little, mildly, moderately or severely impaired HRQoL. We used a multiple linear regression analysis to examine whether patient characteristics were associated with treatment satisfaction. RESULTS: In total 303 patients (40·4%) were included. Patients under current treatment (n = 265, 87·5%) were moderately satisfied with their treatment. Patients rated 'treatment effectiveness' as most important, although 58 (22%) were dissatisfied with the effectiveness of their current treatment. More impairment on the HRQoL emotions domain and a higher degree of disease severity were both associated with lower satisfaction with treatment and explained in total 13·5% of the variance in treatment satisfaction. On all HRQoL domains, one-third of the patients (range 34·7-38·9%) reported severe impairment. CONCLUSIONS: Patients with LS are moderately satisfied with their treatment, and one-third of patients experience severe impairment of HRQoL. To improve dermatological care, we recommend enhancement of doctor-patient communication, information provision and organization, which may be more amenable to change than treatment effectiveness or safety.

Unilateral ultra-brief pulse electroconvulsive therapy for depression in Parkinson's disease.

OBJECTIVES: Electroconvulsive therapy (ECT) has demonstrated efficacy in treating core symptoms of Parkinson's disease (PD); however, widespread use of ECT in PD has been limited due to concern over cognitive burden. We investigated the use of a newer ECT technology known to have fewer cognitive side effects (right unilateral [RUL] ultra-brief pulse [UBP]) for the treatment of medically refractory psychiatric dysfunction in PD. MATERIALS AND METHODS: This open-label pilot study included 6 patients who were assessed in the motoric, cognitive, and neuropsychiatric domains prior to and after RUL UBP ECT. Primary endpoints were changes in total score on the HAM-D-17 and GDS-30 rating scales. RESULTS: Patients were found to improve in motoric and psychiatric domains following RUL UBP ECT without cognitive side effects, both immediately following ECT and at 1-month follow-up. CONCLUSIONS: This study demonstrates that RUL UBP ECT is safe, feasible, and potentially efficacious in treating multiple domains of PD, including motor and mood, without clear cognitive side effects.

Consumer Quality Index Chronic Skin Disease (CQI-CSD): a new instrument to measure quality of care from the patient's perspective.

BACKGROUND: Assessing quality of care from the patient's perspective is considered to be highly relevant. As a standardized instrument in dermatology was lacking, we developed a patient experience questionnaire regarding chronic skin disease care: the Consumer Quality Index Chronic Skin Disease (CQI-CSD). OBJECTIVES: (i) To evaluate the dimensional structure of the CQI-CSD, (ii) to assess its ability to distinguish between hospitals according to patients' experiences with quality of care, (iii) to explore patients' experiences with dermatological care and priorities for quality improvement according to the patients, and (iv) to optimize the questionnaire based on psychometric results and stakeholders' input. METHODS: In a cross-sectional study 5647 adult patients who received dermatological care in the past 12 months in 20 hospitals were randomly selected and invited to fill out the questionnaire. RESULTS: Overall 1160 of 3989 eligible respondents (29% response rate, 30-87 per hospital) were included for analysis. The CQI-CSD comprised seven scales with high internal consistency (Cronbach's α = 0·74-0·92). The instrument's discriminative power was limited. Patients were positive about the care provided by nurses and doctors, but the provision of information by healthcare providers, accessibility of care and patient involvement could be improved. We optimized the CQI-CSD, resulting in a revised questionnaire containing 65 items. CONCLUSIONS: In conclusion, the CQI-CSD is a useful instrument to measure patient experiences with dermatological care.

Psychometric properties of the Sexual Adjustment Questionnaire (SAQ) in the Iranian population with spinal cord injury.

STUDY DESIGN: This is a cross-sectional study. OBJECTIVES: The objective of this study was to examine the psychometric properties of the Sexual Adjustment Questionnaire (SAQ) for Iranian people with spinal cord injury. SETTING: This study was conducted in the brain and Spinal Cord Injury Research Center, Tehran University of Medical Sciences, Tehran, Iran. METHODS: We assessed the psychometric properties of the SAQ, with 200 participants (men=146, women=54) completing the scale. An evaluation of its test-retest reliability was performed over a 2-weeks period, on a subsample of 30 patients recruited from the overall group. Cronbach's α-coefficient was computed for assessment of internal consistency reliability. In addition, content and face validity were examined by an expert committee. Construct validity was assessed by examining convergent and discriminant validity. Finally, exploratory factor analysis was used to extract the factor structure of the questionnaire. RESULTS: The Cronbach's α and intraclass correlation coefficient were 0.77 and 0.72 retrospectively. With regard to construct validity, there was a significant (P=0.009) negative correlation (r=-0.28) between the SAQ score and age. Those with lower levels of educations scored significantly lower on the SAQ (P=0.04). The exploratory factor analysis indicated a four-factor structure for the questionnaire, accounting for 68.9% of the observed variance. The expert committee approved the face and content validity of the developed measure. CONCLUSION: The SAQ is a valid measure for assessing sexual adjustment in people with spinal cord injury. The evaluation of sexual well-being may be useful in clinical trials and practical settings.

EADV Taskforce's recommendations on measurement of health-related quality of life in paediatric dermatology.

The impact of skin conditions in children can profoundly affect a variety of lifestyle parameters that may have important personal consequences. Several national guidelines for children with different skin conditions recommend health-related quality of life (HRQoL) measurement as part of the assessment process. HRQoL also plays an important role in educational programmes for children with chronic skin conditions and their parents. In this paper, the EADV Taskforce on Quality of life provides researchers and clinicians data on the achievements in this field, as well as the peculiarities of HRQoL assessment in children, and an overview of the most commonly used and validated generic, dermatology-specific and disease-specific instruments related to paediatric dermatology. Finally, an analysis of the current problems of HRQoL assessment in children with skin diseases and directions for future studies are also discussed. The main goal of this paper is to help dermatologists decide which HRQoL instrument to use with children, depending on the context.

Summary of the Dutch S3-guidelines on the treatment of psoriasis 2011. Dutch Society of Dermatology and Venereology.

This document provides a summary of the Dutch S3-guidelines on the treatment of psoriasis. These guidelines were finalized in December 2011 and contain unique chapters on the treatment of psoriasis of the face and flexures, childhood psoriasis as well as the patient's perspective on treatment. They also cover the topical treatment of psoriasis, photo(chemo)therapy, conventional systemic therapy and biological therapy.

Life review in groups? An explorative analysis of social processes that facilitate or hinder the effectiveness of life review.

OBJECTIVES: Life review can be implemented within a group as well as on an individual level. There have been few discussions about which the format is most effective. This study investigates the social aspects of a life-review group intervention from the perspective of the client within the context of a large, randomized controlled trial. METHOD: This was an exploratory study using a qualitative methodology. We conducted semi-structured interviews to explore how participants felt about the benefits and barriers of receiving life review in a group. Transcripts of the interviews were analyzed using inductive analysis. RESULTS: The social processes of life review in a group included experiencing a sense of belonging, feeling accepted, finding good company, disclosing oneself, learning to express oneself, finding recognition, realizing that others have problems too, being more successful at coping than others, learning from others, and being able to help others. Negative processes were less often mentioned and included having difficulties with sharing in a group, finding no recognition, and anxiety caused by the prospect of finding no recognition. These social processes can be divided into three categories: first, having a good atmosphere in the group; second, disclosure to peers; and third, relating to others. CONCLUSION: Our results reveal a variety of social processes that may facilitate the effects of life-review therapy. Future research, however, is needed to further examine the importance of these social processes and their effects on depression.

Satisfaction with treatment among patients with psoriasis: a web-based survey study.

BACKGROUND: Various psoriasis treatments are currently available: topical therapy, photo(chemo)therapy, oral agents and biologics. Little is known about patients' satisfaction with these treatment options. Moreover, the few available studies show methodological shortcomings. OBJECTIVES: To answer the following questions: firstly, how satisfied are patients with psoriasis with their current treatment and does patients' satisfaction significantly differ between treatment types when controlling for demographic and clinical factors? Secondly, how important are specific domains of satisfaction to patients, and when taking perceived importance into account, which domains merit the most attention in improving quality of care? METHODS: Members of the two existing Dutch associations for patients with psoriasis were invited to complete a web-based survey, which included a study-specific satisfaction questionnaire. RESULTS: A total of 1293 patients completed the survey (response rate 32%). Overall, patients were moderately satisfied with their current treatment. Patients receiving topical treatment were significantly least satisfied; patients receiving biologic treatment were significantly most satisfied. Overall, patients rated 'treatment effectiveness' as most important, followed by 'treatment safety' and 'doctor-patient communication'. Domains with the highest 'room for improvement' scores were effectiveness of topical therapy, phototherapy and oral agents (but not biologic treatment), convenience of topical treatment and safety of systemic treatments (both oral agents and biologics). CONCLUSIONS: From the perspective of patients, biologic treatment is promising. To improve further the quality of psoriasis care, the effectiveness and convenience of topical therapies, the safety of systemic therapies, and doctors' communication skills need to be addressed.

Measurement of health-related quality of life in dermatological research and practice: outcome of the EADV Taskforce on Quality of Life.

In the last decade, the importance of the measurement of health-related quality of life (HRQoL) has grown significantly. Today, HRQoL measurement is generally considered to be important in clinical trials, in the assessment of disease severity, in patient management and in the field of health economics. Therefore, a good understanding of the concept of HRQoL and its measurement instruments is a prerequisite for both researchers and clinicians. The European Academy for Dermatology and Venereology (EADV) Taskforce on Quality of Life encourages the application of HRQoL instruments in research and clinical practice, and with this manuscript, the Taskforce aims to contribute to the quality of this application. In dermatology, a large number of HRQoL instruments exist and herewith, we summarize the most commonly used generic and dermatology-specific HRQoL instruments. Information is given on the most important psychometric characteristics of these instruments, including: scale structure, reliability, validity and responsiveness. Furthermore, a flow chart is provided to support researchers and clinicians in selecting an existing instrument or, in case an appropriate instrument does not exist, in finding alternative solutions. The present manuscript is the first of a series of manuscripts to be written on behalf of the EADV Taskforce on Quality of Life, aiming to contribute to the scientific knowledge and measurement of patient reported outcomes in dermatological research and practice.

Health-related quality-of-life assessment in dermatologic practice: relevance and application.

Health-related quality of life (HRQoL) is gradually becoming a standard outcome in clinical research and health care management. Nevertheless, application in dermatologic practice is not customary and many practical and attitudinal barriers need to be overcome. To contribute to the discussion on and the implementation of HRQoL assessment in routine dermatologic practice, this article describes (1) why HRQoL assessment is relevant for dermatologic practice, (2) which patients would benefit most from routine HRQoL assessment, and (3) how HRQoL assessment can be applied in clinical practice.

Impact of maternal diabetes on birthweight is greater in non-Hispanic blacks than in non-Hispanic whites.

AIMS/HYPOTHESIS: To determine the impact of maternal diabetes during pregnancy on racial disparities in fetal growth. METHODS: Using linked birth certificate, inpatient hospital and prenatal claims data we examined live singleton births of mothers resident in South Carolina who self-reported their race as non-Hispanic white (NHW; n = 140,128) or non-Hispanic black (NHB; n = 82,492) and delivered at 28-42 weeks' gestation between 2004 and 2008. RESULTS: Prepregnancy diabetes prevalence was higher in NHB (3.0%) than in NHW (1.7%), while the prevalence of gestational diabetes mellitus (GDM) was similar in NHB (6.1%) and NHW (6.3%). At a delivery BMI of 35 kg/m(2), GDM exposure was associated with an average birthweight only 17 g (95% CI 4, 30) higher in NHW, but 78 g (95% CI 61, 95) higher in NHB (controlling for gestational age, maternal age, infant sex and availability of information on prenatal care). Figures for prepregnancy diabetes were 58 g (95% CI 34, 81) in NHW and 60 g (95% CI 37, 84) in NHB. GDM had a greater impact on birthweight in NHB than in NHW (60 g racial difference [95% CI 39, 82]), while prepregnancy diabetes had a large but similar impact. Similarly, the RR for GDM of having a large- relative to a normal-weight-for-gestational-age infant was lower in NHW (RR 1.41 [95% CI 1.34, 1.49]) than in NHB (RR 2.24 [95% CI 2.05, 2.46]). CONCLUSIONS/INTERPRETATION: These data suggest that the negative effects of GDM combined with obesity during pregnancy may be greater in NHB than in NHW individuals.

Life review therapy for older adults with moderate depressive symptomatology: a pragmatic randomized controlled trial.

BACKGROUND. Although there is substantial evidence for the efficacy of life review therapy as an early treatment of depression in later life, its effectiveness in natural settings has not been studied. The present study evaluates an intervention based on life review and narrative therapy in a large multi-site, pragmatic randomized controlled trial(RCT). METHOD. Life review therapy was compared with care as usual. The primary outcome was depressive symptoms;secondary outcomes were anxiety symptoms, positive mental health, quality of life, and current major depressive episode (MDE). To identify groups for whom the intervention was particularly effective, moderator analyses were carried out (on sociodemographic variables, personality traits, reminiscence functions, clinically relevant depressive and anxiety symptoms, and past MDEs). RESULTS. Compared with care as usual (n=102), life review therapy (n=100) was effective in reducing depressive symptoms, at post-treatment (d=0.60, B= -5.3, p<0.001), at 3-month follow-up (d=0.50, B= -5.0, p<0.001) and for the intervention also at 9-month follow-up (t=5.7, p<0.001). The likelihood of a clinically significant change in depressive symptoms was significantly higher [odds ratio (OR) 3.77, p<0.001 at post-treatment ; OR 3.76, p<0.001 at the 3-month follow-up]. Small significant effects were found for symptoms of anxiety and positive mental health.Moderator analyses showed only two significant moderators, the personality trait of extraversion and the reminiscence function of boredom reduction. CONCLUSIONS. This study shows the effectiveness of life review therapy as an early intervention for depression in an ecologically valid context, supporting its applicability to a broad target group. The intervention is also effective in reducing anxiety symptoms and strengthening positive mental health.

Center-by-center results of a multicenter prospective trial to determine the inter-observer correlation of the simplified POP-Q in describing pelvic organ prolapse.

INTRODUCTION AND HYPOTHESIS: This study was conducted to determine the differences in the inter-observer agreement of the simplified Pelvic Organ Prolapse Quantification (POP-Q) system from center to center in a large international multicenter study. METHODS: This is a secondary analysis of the results of a large prospective single blind multicenter trial studying the inter-observer agreement of a simplified POP-Q exam. Twelve centers from four continents with a total of 511 subjects were included in this study. The number of subjects recruited per center ranged from 20 to 81. Each patient was independently examined by two investigators, with examination order randomly assigned and investigators blinded to each other's result. The weighted kappa statistic was used to evaluate the inter-observer agreement. RESULTS: Good and significant associations were observed on the anterior, posterior, and apical segments. Six out of 11 sites did not provide adequate number of subjects with prior hysterectomy for weighted kappa statistics or achieve significance regarding vaginal cuff measurement. CONCLUSIONS: The simplified POP-Q demonstrated good inter-examiner agreement across multiple centers.

A randomized comparison of excimer laser versus narrow-band ultraviolet B phototherapy after punch grafting in stable vitiligo patients.

Background Ultraviolet radiation following punch grafting may stimulate the migration of melanocytes from the grafts into the vitiliginous skin, thereby increasing the rate of repigmentation. We compared the effects of the 308-nm xenon chloride excimer laser (EL) vs. narrow-band ultraviolet B (NB-UVB) after punch grafting in patients with vitiligo. Objectives The aims of this study were to evaluate (i) repigmentation (%); (ii) treatment satisfaction; and (iii) patient preferences for EL vs. NB-UVB therapy after punch grafting in vitiligo. Methods Fourteen patients were treated with the punch-grafting technique on two symmetrical vitiligo patches. Starting 1 week after the punch grafting, the vitiligo patches were treated twice a week during 3 months, with EL on one side and with NB-UVB on the other side. Repigmentation (%) was measured by a digital image analysis system. Patients' satisfaction and preference for treatment were also assessed. Results Whereas both treatment modalities induced repigmentation, no statistically significant difference was found in grade of repigmentation after 3 months. With EL, 71.4% lower cumulative dose was reached. Patients were significantly more satisfied with NB-UVB and preferred it over EL. Conclusions The choice between EL and NB-UVB cannot solely be based on repigmentation, but rather on other factors, such as patients' preferences. However, given the lower UV dose of EL, we recommend its use in vulnerable populations, such as in small children and patients with sun-damaged skin with a history of long-term UVB treatment.

Controlling inbreeding and maximizing genetic gain using semi-definite programming with pedigree-based and genomic relationships.

Because of the relatively high levels of genetic relationships among potential bull sires and bull dams, innovative selection tools should consider both genetic gain and genetic relationships in a long-term perspective. Optimum genetic contribution theory using official estimated breeding values for a moderately heritable trait (production index, Index-PROD), and a lowly heritable functional trait (index for somatic cell score, Index-SCS) was applied to find optimal allocations of bull dams and bull sires. In contrast to previous practical applications using optimizations based on Lagrange multipliers, we focused on semi-definite programming (SDP). The SDP methodology was combined with either pedigree (a(ij)) or genomic relationships (f(ij)) among selection candidates. Selection candidates were 484 genotyped bulls, and 499 preselected genotyped bull dams completing a central test on station. In different scenarios separately for PROD and SCS, constraints on the average pedigree relationships among future progeny were varied from a(ij)=0.08 to a(ij)=0.20 in increments of 0.01. Corresponding constraints for single nucleotide polymorphism-based kinship coefficients were derived from regression analysis. Applying the coefficient of 0.52 with an intercept of 0.14 estimated for the regression pedigree relationship on genomic relationship, the corresponding range to alter genomic relationships varied from f(ij) = 0.18 to f(ij) = 0.24. Despite differences for some bulls in genomic and pedigree relationships, the same trends were observed for constraints on pedigree and corresponding genomic relationships regarding results in genetic gain and achieved coefficients of relationships. Generally, allowing higher values for relationships resulted in an increase of genetic gain for Index-PROD and Index-SCS and in a reduction in the number of selected sires. Interestingly, more sires were selected for all scenarios when restricting genomic relationships compared with restricting pedigree relationships. For example, at constraint of f(ij)=0.185 and selection on Index-PROD, the number of selected sires was 35. In contrast, only 21 sires were selected at the comparable constraint on additive genetic relationship of a(ij)=0.09. A further reduction in relationships is possible when using SDP output (i.e., suggested genetic contributions of selected parents) and applying a simulated annealing algorithm to define specific mating plans. However, the advantage of this strategy is limited to a short-term perspective and probably not successful in the period of genomic selection allowing a substantial reduction of generation intervals.

HIV rapid testing in substance abuse treatment: implementation following a clinical trial.

The Substance Abuse Mental Health Services Administration has promoted HIV testing and counseling as an evidence-based practice. Nevertheless, adoption of HIV testing in substance abuse treatment programs has been slow. This article describes the experience of a substance abuse treatment agency where, following participation in a clinical trial, the agency implemented an HIV testing and counseling program. During the trial, a post-trial pilot, and early implementation the agency identified challenges and developed strategies to overcome barriers to adoption of the intervention. Their experience may be instructive for other treatment providers seeking to implement an HIV testing program. Lessons learned encompassed the observed acceptability of testing and counseling to clients, the importance of a "champion" and staff buy-in, the necessity of multiple levels of community and agency support and collaboration, the ability to streamline staff training, the need for a clear chain of command, the need to develop program specific strategies, and the requirement for sufficient funding. An examination of costs indicated that some staff time may not be adequately reimbursed by funding sources for activities such as adapting the intervention, start-up training, ongoing supervision and quality assurance, and overhead costs.

[Validation of a syndromic surveillance system of acute respiratory tract diseases in preschools of Schleswig-Holstein (SHARE)]. / Validierung einer syndromischen Surveillance akuter Respirationstrakt-Erkrankungen in Kindergärten und Kindertagesstätten Schleswig-Holsteins (SHARE).

To obtain reliable, regionalized, and timely data for the spread of seasonal influenza in various age groups, which are preferentially affected by the influenza virus, a syndromic surveillance system for acute respiratory tract infections in Schleswig-Holstein (SHARE) was established in preschools and nurseries starting in 2006. The Schleswig-Flensburg district with 12 of 114 preschools and nurseries and 850 of 5,750 supervised children served as a pilot district. The weekly rates of sickness absenteeism correlated most strongly with the onset of seasonal influenza and with population density during the first half of the year. Mean annual sickness absenteeism levels of above 6% occurred more frequently above a population density of 200 inhabitants/km(2) than below this density (relative risk 2.50, 95% confidence interval 1.18-5.32). By analysis of the receiver-operating characteristic curve, the diagnostic performance of the SHARE system as a classifier for seasonal influenza was determined. The sensitivity was 83% and the specificity was 79% when sickness absence rates exceeded 5%. The performance of the SHARE system correlated with the size of the kindergarten. In 2008, 13 of 15 districts of Schleswig-Holstein participated with 157 of 1,684 kindergarten and 10,300 of 113,000 children. The evaluation for 2008 confirmed that the SHARE system is suitable for the surveillance of seasonal influenza at the district and state levels.