Mutation-specific reporter for optimization and enrichment of prime editing.

Prime editing is a versatile genome-editing technique that shows great promise for the generation and repair of patient mutations. However, some genomic sites are difficult to edit and optimal design of prime-editing tools remains elusive. Here we present a fluorescent prime editing and enrichment reporter (fluoPEER), which can be tailored to any genomic target site. This system rapidly and faithfully ranks the efficiency of prime edit guide RNAs (pegRNAs) combined with any prime editor variant. We apply fluoPEER to instruct correction of pathogenic variants in patient cells and find that plasmid editing enriches for genomic editing up to 3-fold compared to conventional enrichment strategies. DNA repair and cell cycle-related genes are enriched in the transcriptome of edited cells. Stalling cells in the G1/S boundary increases prime editing efficiency up to 30%. Together, our results show that fluoPEER can be employed for rapid and efficient correction of patient cells, selection of gene-edited cells, and elucidation of cellular mechanisms needed for successful prime editing.

[Bone growth stimulators for fractures; sensible or not?] / Botgroeistimulatoren bij fracturen.

More and more patients with fractures are asking for bone growth stimulators. There are currently 2 types of bone growth stimulators on the market: stimulators using pulsed electromagnetic fields (PEMF) and stimulators using low-intensity pulsed ultrasound (LIPUS). There is insufficient evidence that LIPUS bone growth stimulator treatment is useful in patients with fresh fractures; the effects of LIPUS bone growth stimulation for delayed-union and non-union fractures need more in-depth investigation. There is also insufficient evidence that PEMF bone growth stimulation has beneficial effects on the healing of fresh fractures and delayed-union and non-union fractures. We do not recommend routine use of bone growth stimulators, partly because of the significant costs involved.

Development of an Intervention to Create a Supportive Work Environment for Employees with Chronic Conditions: An Intervention Mapping Approach.

Purpose This study describes the development of an evidence-based intervention to create a supportive work environment for employees with chronic conditions. Occupational physicians (OPs) play an important role in guiding organizations in this process of organizational change. Supportive work environments can aid in preventing work-related problems and facilitate sustainable employment. Current workplace interventions for employees with chronic conditions are mainly focused on return to work or a reduction in sick leave at the individual worker's level. This study contributes to the literature an organizational-level intervention which utilizes a preventive approach. Methods Intervention mapping (IM) is a six-step, structured protocol that was used to develop this intervention. In step 1, a needs assessment was conducted to define the problem and explore the perspectives of all stakeholders involved. The program outcomes and the performance objectives of employees with chronic conditions and occupational physicians were specified in step 2. In step 3, appropriate methods and practical applications were chosen. Step 4 describes the actual development of the intervention, consisting of (1) a training for occupational physicians to teach them how to guide organizations in creating a supportive work environment; (2) a practical assignment; and (3) a follow-up meeting. The intervention will be implemented in a pilot study in which occupational physicians will put their acquired knowledge and skills into practice within one of their organizations, which is delineated in step 5. Conclusions IM proved to be a valuable and practical tool for the development of this intervention, aiming to facilitate sustainable employment for employees with chronic conditions.

Perceptions of Alcohol and Alcohol Use among Community Members and Young Adults in Ukraine.

Background: Unhealthy alcohol use is a public health issue, prioritized by the World Health Organization (WHO) for prevention and reduction. Ukraine falls in the highest WHO category of "years of life lost" due to alcohol use. Objective: To investigate perceptions of alcohol consumption in a sample of youth and adults in western Ukraine. Methods: In-depth semi-structured interviews were conducted with 38 adult stakeholders (aged 21-63 years), and 81 adolescents and young adults (aged 12-21 years) completed paper-and-pencil open-ended questions. A combined deductive-inductive thematic analysis of these qualitative data resulted in an initial coding scheme for both parts of the data. These initial codes were organized into patterns, which were further condensed to four themes. Results: The four themes that were developed are: (1) The general historical, socio-economic-political situation and its relation to alcohol use, (2) Alcohol in the home and daily environment, (3) Alcohol use, related feelings, peers, family, and burden to health, and (4) Perceptions of the consequences of alcohol (mis)use. Conclusions: Respondents indicated awareness that daily consumption, also in youth, as well as binge drinking and childhood sipping constitute a risk to health. These risks were described in the context of easy availability, low pricing, and peer pressure. The respondents mentioned awareness that alcohol dependence (AD) of parents affected families with the risk of disadvantageous child development. Interventions may include targeting current norms, stigmatizing beliefs and supporting subjects in developing coping skills.

Chronic Kidney Disease-Associated Pruritus and Quality of Life in Malaysian Patients Undergoing Hemodialysis.

CKD-associated pruritus is one of the common symptoms in patients undergoing dialysis, thus contributing to the diminished and compromised quality of life. This study aimed to explore the association between the CKD-associated pruritus on quality of life of patients undergoing hemodialysis in Malaysia. A cross-sectional multicenter study, carried out from February to September 2017 at tertiary care settings in Kuala Lumpur, Malaysia. Patients aged 18 years and above, undergoing hemodialysis, understanding Malay language and willing to participate were included. The CKD-associated pruritus was assessed by using Malay 5D-itch scale and Malay FANLTC questionaiare. To determine the factors associated with pruritus and quality of life, multivariate logistic regression analysis was used having P value < 0.05 as statistically significant. Among n = 334 recruited patients with a response rate of 100%, 59.6% were males and total of 61.3% were having CKD-associated pruritus. The results showed a statistically significant weak negative correlation between CKD-associated pruritus and quality of life. Multivariate linear regression revealed none of these factors were found to be associated with pruritus; however, CKD-associated prurtius was found to be associated with quality of life score. CKD-associated pruritus is have a negative impact on the patient's quality of life including physical, social, mental/emotional, and functional well-being. Despite the high prevalence and negative impact of CKD-associated pruritus on quality of life, it is disregarded by most health care professionals. It is thus pertinent to monitor the potential risk factors and consider providing timely treatment implications for CKD-associated pruritus in hemodialysis patients, in order to improve their quality of life.

Interventions Developed with the Intervention Mapping Protocol in Work Disability Prevention: A Systematic Review of the Literature.

Purposes Intervention mapping (IM) is a protocol for developing effective behavior change interventions. It has been used for 10 years to develop work disability prevention (WDP) interventions, but it is not known to what extent and with what success. The main objective of this study was to review the effectiveness of these interventions. Secondary objectives were to review their fidelity to the IM protocol, their theoretical frameworks and their content. Methods A search strategy was conducted in MEDLINE, Web of Science, PsycINFO, Pascal, Francis, and BDSP. All titles and abstracts were reviewed. A standardized extraction form was developed. All included studies were reviewed by two reviewers blinded to each other. Results Eight WDP interventions were identified aimed at return to work (RTW; n = 6) and self-management at work (n = 2). RTW interventions targeted workers with stress-related mental disorders (n = 1), low back pain (n = 1), musculoskeletal disorders (n = 1), cancer (n = 2) and gynecological surgery (n = 1). The fidelity to the IM protocol was weaker for the participatory planning group. Matrices of change, change methods, and applications were systematically reported. The main theoretical frameworks used were the attitude-social influence-self efficacy model (n = 4) and the theory of planned behavior (n = 2). Half of the interventions included a workplace component (n = 4). Two interventions were reported as effective, and one partially effective. Conclusion The IM protocol is used in WDP since 2007. The participative dimension appears underused. Few theoretical frameworks were used. Implications are to better consider the stakeholders involvement, and mobilize theoretical frameworks with greater attempts to intervene on the work environment.

Women Who Love: An Explorative Study on Experiences of Lesbian and Bisexual Women with a Mild Intellectual Disability in The Netherlands.

Empirical research that addresses sexual orientation in people with an intellectual disability (ID) is limited, and very little is known regarding the personal experiences of lesbian and bisexual women with ID. This study set out to answer the question: What are the experiences of lesbian and bisexual women with a mild intellectual disability in the Netherlands? Ten lesbian and bisexual women (average age of 33 years) with a mild intellectual disability took part in our study comprising of semi-structured interviews. Participants reported that they had found it hard to talk to others about sensitive subjects such as their sexuality, and had been left to figure out information regarding their sexual orientation without support or guidance. Our results point to a lack of information, sexual education and role models when it comes to lesbian sex and women with an intellectual disability. Social contact was often limited, and participants experienced difficulties finding a partner. Furthermore, participants often had to cope with mental health problems and had struggled with loneliness, depression and addiction. Last but not least, our participants reported that they had been discriminated against. Coming out (revealing your sexual orientation) is not easy when you have an intellectual disability. To enable women with ID who have lesbian or bisexual feelings to understand and secure their sexual rights in their daily lives is important. Therefore, it is necessary to provide support in the following domains: sexual education and training, social contact and assertiveness.

Strength exercises during physical education classes in secondary schools improve body composition: a cluster randomized controlled trial.

BACKGROUND: Metabolic health in people with obesity is determined by body composition. In this study, we examined the influence of a combined strength exercise and motivational programme -embedded in the school curriculum- on adolescents body composition and daily physical activity. METHODS: A total of 695 adolescents (11-15y) from nine Dutch secondary schools participated in a one year cluster randomised controlled trial (RCT). In the intervention schools, physical education teachers were instructed to spend 15-30 min of all physical education lessons (2× per week) on strength exercises. Monthly motivational lessons were given to stimulate students to be more physically active. Control schools followed their usual curriculum. The primary outcome measure was body composition assessed by the deuterium dilution technique. Daily physical activity and sedentary behaviour measured by accelerometry served as a secondary outcome. RESULTS: After 1 year, a 1.6% fat mass difference was found in favour of the intervention group (p = .007). This reflected a 0.9 kg difference in fat free mass (intervention>control; p = .041) and 0.7 kg difference in fat mass (intervention

Changing distribution and abundance of the malaria vector Anopheles merus in Mpumalanga Province, South Africa.

Background: The malaria vector Anopheles merus occurs in the Mpumalanga Province of South Africa. As its contribution to malaria transmission in South Africa has yet to be ascertained, an intensification of surveillance is necessary to provide baseline information on this species. The aim of this study was therefore to map An. merus breeding sites in the Ehlanzeni District of Mpumalanga Province and to assess qualitative trends in the distribution and relative abundance of this species over a 9-year period. Methods: The study was carried out during the period 2005-2014 in the four high-risk municipalities of Ehlanzeni District. Fifty-two breeding sites were chosen from all water bodies that produced anopheline mosquitoes. The study data were extracted from historical entomological records that are captured monthly. Results: Of the 15 058 Anopheles mosquitoes collected, 64% were An. merus. The abundance and distribution of An. merus increased throughout the four municipalities in Ehlanzeni District during the study period. Conclusion: The expanded distribution and increased abundance of An. merus in the Ehlanzeni District may contribute significantly to locally acquired malaria in Mpumalanga Province, likely necessitating the incorporation of additional vector control methods specifically directed against populations of this species.

Contexte : Le vecteur du paludisme, Anopheles merus, sévit dans la province de Mpumalanga en Afrique du Sud. Comme sa contribution à la transmission du paludisme en Afrique du Sud reste à vérifier, une intensification de la surveillance est nécessaire afin de fournir des informations de départ sur cette espèce. Le but de cette étude a donc été de cartographier les sites de reproduction de An. merus dans le district d'Ehlanzeni de la province de Mpumalanga et d'évaluer les tendances qualitatives de la distribution et de l'abondance relative de cette espèce sur une période de 9 ans.Méthodes : Cette étude a été réalisée pendant la période de 2005 à 2014 dans les quatre municipalités à risque élevé du district d'Ehlanzeni. Cinquante-deux sites de reproduction ont été choisis dans tous les plans d'eau qui ont produit des moustiques de l'espèce anophèle. Les données de l'étude ont été extraites de registres entomologiques historiques qui sont saisis chaque mois.Résultats : Sur les 15 058 moustiques Anopheles recueillis, 64% ont été An. merus. L'abondance et la distribution d'An. merus ont augmenté dans les quatre municipalités du district d'Ehlanzeni pendant la période d'étude.Conclusion: La distribution en expansion et l'abondance accrue d'An. merus dans le district d'Ehlanzeni peut contribuer significativement au paludisme acquis localement dans la province de Mpumalanga et nécessite l'incorporation de méthodes de lutte vectorielle supplémentaires spécifiquement dirigées contre les populations de cette espèce.

Marco de referencia: Anopheles merus, vector del paludismo, está presente en la provincia de Mpumalanga de Suráfrica. Puesto que no se ha determinado su contribución a la transmisión del paludismo en el país, es necesario intensificar la vigilancia, con el fin de aportar información de referencia sobre esta especie. El objetivo del estudio fue cartografiar los criaderos de An. merus en el distrito de Ehlanzeni de la provincia de Mpumalanga y evaluar la evolución cuantitativa de la distribución y la abundancia relativa de esta especie durante un período de 9 años.Métodos: El estudio se llevó a cabo del 2005 al 2014 en cuatro municipios de alto riesgo de transmisión del distrito de Ehlanzeni. Se escogieron 52 criaderos de todas las masas de agua productoras de mosquitos anófeles. Los datos del estudio se extrajeron de los registros entomológicos históricos que se captan cada mes.Resultados: De los 15 058 mosquitos anófeles recogidos, el 64% correspondía a An. merus; su abundancia y distribución aumentó en los cuatro municipios del distrito de Ehlanzeni durante el período del estudio.Conclusión: La ampliación de la distribución y el aumento de la presencia de An. merus en el distrito de Ehlanzeni pueden contribuir de manera significativa a los casos de paludismo adquiridos localmente en la provincia de Mpumalanga, y es probable que sera necesario incorporar otros métodos de control de vectores dirigidos específicamente contra las poblaciones de esta especie.

Sexuality and individual support plans for people with intellectual disabilities.

BACKGROUND: Sexual rights and sexuality are important aspects of quality of life, also for people with intellectual disabilities (IDs). However, providing support in this area to people with ID poses some challenges. In this study, the content of individual support plan (ISP) documents was analysed to determine the extent to which sexuality and sexual rights are addressed in part of the ISP documents. METHOD: Content analysis was carried out on a sample of 187 ISP documents from seven different service provider organisations in the Netherlands. First, we conducted a lexical search using terms related to sexuality and sexual health. The retrieved segments were then analysed. RESULTS: A total of 159 ISP documents (85%) of 60 men and 99 women contained some reference to aspects of sexuality. However, these references were mostly descriptive and offered little guidance in terms of providing support. Moreover, these notations mostly described negative or problematic aspects of sexuality. References to sexual education, treatment, intervention programs or support strategies were rarely found in the ISP documents. CONCLUSIONS: Although sexuality is addressed in most ISP documents, there is little information available about the provision of professional support in this area that would give people the opportunity to exert sexual rights. As sexuality and exerting sexual rights are important for people with ID as well as for other people, it is recommended that issues surrounding proactive sex education, shared decision-making and the implementation of sexual healthcare plans are addressed in the ISP.

Let's talk about sex: A qualitative study exploring the experiences of HIV nurses when discussing sexual risk behaviours with HIV-positive men who have sex with men.

BACKGROUND: Despite prevention efforts, the incidence of sexually transmitted infection among HIV-positive men who have sex with men remains high, which is indicative of unchanged sexual risk behaviour. Discussing sexual risk behaviour has been shown to help prevent sexually transmitted infections among HIV-positive men who have sex with men. OBJECTIVES: The aim of this study was to identify factors that influence whether - and how - specialised HIV nurses discuss sexual risk behaviour with HIV-positive men who have sex with men. Identifying these factors could indicate how best to improve the frequency and quality of discussions about sexual risk behaviour, thereby reducing sexual risk behaviour and sexually transmitted infections. DESIGN: Qualitative study, focus groups among HIV nurses. SETTING: Dutch HIV treatment centres. PARTICIPANTS: A purposive sample was taken of 25 out of 87 HIV nurses working in one of the 26 specialised HIV treatment centres in the Netherlands. Of the 25 HIV nurses we approached, 22 participate in our study. METHODS: Three semi-structured focus group interviews were held with 22 HIV nurses from 17 hospitals. Interviews were transcribed verbatim, and thematic analysis was performed. RESULTS: HIV nurses agreed that discussing sexual risk behaviour is important, but barriers were experienced in relation to doing so. In accordance with the theory of planned behaviour, attitudes, perceived norms and perceived behavioural control were all found to be relevant variables. Barriers to discussing sexual risk behaviour were identified as: dealing with embarrassment, the changing professional role of an HIV nurse, time constraints, and the structure of the consultation. CONCLUSIONS: To improve the frequency and quality of discussions about sexual risk behaviour with HIV-positive men who have sex with men, our data suggests it would be beneficial to support HIV nurses by developing tools and guidelines addressing what to discuss and how. Using a related topic as a conversational 'bridge' may help nurses to broach this subject with their patients. This would allow HIV nurses to discuss possible risk reduction strategies, such as pre-exposure prophylaxis for HIV-negative partners, condom use, strategic positioning, or sero-sorting.

People with Intellectual Disabilities Talk About Sexuality: Implications for the Development of Sex Education.

Existing sex education programmes have failed in involving people with intellectual disabilities in the development of these programmes. Not involving the target population decreases the likelihood that the sex education programme will be effective. This study was conducted to assess the perspectives of people with intellectual disabilities on several sexuality-related topics. Semi-structured interviews were held with 20 people with intellectual disabilities covering topics such as: sex education, relationships, sex, social media, parenthood and support. The reported frequency of sex education the participants receive is low. Their knowledge regarding sex education is mainly limited to topics such as safe sex, contraception and STI's and tends to be superficial. Additionally, knowledge on safe sex does not always translate to safe sex behaviour. Finally, relationships are important for most participants; mainly because they don't want to be alone. Findings from both this study and literature shows that there seems to be a need for high quality sex education. Topics to consider to include are: online relationships, social media and parenthood. It would also be beneficial to focus on sexuality-related skills. Finally, to increase the effectiveness of a sex education programme, it is advisable that a theory-and evidence-based framework, such as Intervention Mapping, is used for its development.

Fetal Alcohol Spectrum Disorders (FASD): an Approach to Effective Prevention.

PURPOSE OF REVIEW: The objective of the current contribution is to propose an evidence-based, six-step approach to develop effective programs for prevention of fetal alcohol spectrum disorders. RECENT FINDINGS: Despite widespread campaigns aimed to reduce prenatal alcohol exposure, the number of affected children continues to be high. Current strategies to reduce prenatal alcohol exposure may be ineffective or counterproductive. However, proven principles of health promotion could be applied to reduce drinking in pregnancy. One such approach is Intervention Mapping (IM), a six-step procedure based on proven principles to change behaviors. SUMMARY: FASD affects all communities and is an underestimated problem worldwide. Programs based on proven principles of behavior change are warranted. Program developers can use pre-existing protocols and strategies from evidence-based practice, such as Intervention Mapping. Developers who plan their preventive programs in a systematic and evidence-based manner increase the chances of success in reducing prenatal alcohol exposure and FASD.

The Dutch 'Focus on Strength' intervention study protocol: programme design and production, implementation and evaluation plan.

BACKGROUND: Overweight youngsters are better in absolute strength exercises than their normal-weight counterparts; a physiological phenomenon with promising psychological impact. In this paper we describe the study protocol of the Dutch, school-based program 'Focus on Strength' that aims to improve body composition of 11-13 year old students, and with that to ultimately improve their quality of life. METHODS: The development of this intervention is based on the Intervention Mapping (IM) protocol, which starts from a needs assessment, uses theory and empirical research to develop a detailed intervention plan, and anticipates program implementation and evaluation. This novel intervention targets first year students in preparatory secondary vocational education (11-13 years of age). Teachers are the program implementers. One part of the intervention involves a 30 % increase of strength exercises in the physical education lessons. The other part is based on Motivational Interviewing, promoting autonomous motivation of students to become more physically active outside school. Performance and change objectives are described for both teachers and students. The effectiveness of the intervention will be tested in a Randomized Controlled Trial in 9 Dutch high schools. DISCUSSION: Intervention Mapping is a useful framework for program planning a school-based program to improve body composition and motivation to exercise in 11-13 year old adolescents by a "Focus on Strength". TRIAL REGISTRATION: NTR5676 , registered 8 February 2016 (retrospectively registered).

Sociocognitive predictors of the intention of healthcare workers to receive the influenza vaccine in Belgian, Dutch and German hospital settings.

BACKGROUND: Influenza vaccination of healthcare workers (HCWs) is recommended to prevent the transmission of influenza to vulnerable patients. Nevertheless, vaccination coverage rates of HCWs in European countries have been low. AIM: To investigate the relative and combined strength of sociocognitive variables, from past research, theory and a qualitative study, in explaining the motivation of HCWs to receive the influenza vaccine. METHODS: An anonymous, online questionnaire was distributed among HCWs in hospital settings in Belgium, Germany and the Netherlands between February and April 2013. FINDINGS: Attitude and past vaccination uptake explained a considerable amount of variance in the intention of HCWs to receive the influenza vaccine. Moreover, low perceived social norms, omission bias, low moral norms, being older, having no patient contact, and being Belgian or Dutch (compared with German) increased the probability of having no intention to receive the influenza vaccine compared with being undecided about vaccination. High intention to receive the influenza vaccine was shown to be more likely than being undecided about vaccination when HCWs had high perceived susceptibility of contracting influenza, low naturalistic views, and lower motivation to receive the vaccine solely for self-protection. CONCLUSION: Country-specific interventions and a focus on different sociocognitive variables depending on the intention/lack of intention of HCWs to receive the influenza vaccine may be beneficial to promote vaccination uptake.

Prevalence, risk factors and quality of life in Turkish women with urinary incontinence: a synthesis of the literature.

BACKGROUND: Urinary incontinence (UI) is not a life threatening condition but it adversely affects physical and mental health, sexual function and quality of life in women. AIM: To review the related literature to identify prevalence, risk factors and quality of life among only Turkish women. METHODS: Computerized searches on PubMed, Turkish Medline, EBSCO Host; articles from indexed journals related to the topics in this review and published between 1996 and 30 April 2012 were evaluated. After completion of database searches, a final total of 20 studies were identified that fitted the inclusion criteria. RESULTS: This review revealed that the prevalence of UI among Turkish women was reported by 16 studies ranged from 16.4% to 49.7%. The most common risk factors were age, number of births, body mass index > 25 kg/m(2), recurrent urinary infection, diabetes mellitus and vaginal delivery. The effect of UI on the quality of life was mild to moderate. CONCLUSIONS: We found that the prevalence of UI of Turkish women showed a wide range. It is important for health professionals to be aware of the high prevalence of UI in women and to ask about its possible presence. Improving the quality of life in women with UI is an important issue and nurses should direct women to seek psychosocial support. The findings of this review could serve as a source of information for health systems that deal with UI, and it may help to inform health professionals and women with UI on early diagnosis, treatment and management.

Homosexuality among people with a mild intellectual disability: an explorative study on the lived experiences of homosexual people in the Netherlands with a mild intellectual disability.

BACKGROUND: Empirical research on homosexuality among people with an intellectual disability (ID) is limited and, to date, very little is known regarding the personal experiences of gay and lesbian people with an ID. This study set out to answer the question: What are the lived experiences of a specific cohort of homosexual people with an intellectual disability living in the Netherlands? METHOD: To answer this question, a qualitative study was performed in which 21 people with a mild ID were interviewed via semi-structured interviews. In this study, 19 participants were men and two were women (average age = 40.5 years). RESULTS: Participants reported positive and negative experiences, and talked about their gay or lesbian identity. Almost half of the participants (n = 10) reported that they had experienced sexual abuse including partner violence (n = 6). Additionally, they indicated that there was a lack of support for homosexual people with an ID. CONCLUSION: Specific problems impact the lives of homosexual people with ID, namely the high prevalence of negative sexual experiences, the lack of support, training and sex education, and their search for a suitable partner.

Ageing with an intellectual disability: the impact of personal resources on well-being.

BACKGROUND: The population of ageing people with mild and moderate intellectual disabilities (ID) is growing rapidly. This study examines how personal resources (physical health, mental health and social networks) impact the well-being of ageing people with ID. METHODS: Longitudinal survey data on 667 people with a mild or moderate ID were acquired via interviews in 2006 and 2010. Indicators of personal resources (physical health, mental health and social networks) were assessed, as were indicators of well-being (satisfaction with life, happiness and loneliness). Additionally, data on background characteristics and autonomy were gathered. RESULTS: The results show that age is positively related to decreased mobility and auditory disabilities and negatively related to independent living, autonomy in how one spends one's leisure time and autonomy in decision-making. Longitudinal analyses demonstrated that, with the exception of health that deteriorated, and social satisfaction that improved, almost all variables remained stable over the 4-year period. Further, good physical health in 2006 predicted happiness in 2010. CONCLUSION: Despite the fact that age is associated with poorer physical and mental health and a smaller social network, this study showed that older people with ID have relatively high levels of well-being. Findings are discussed in the light of coping with ageing and impact of life events.

Many-wavelength interferometry with thousands of lasers for absolute distance measurement.

We demonstrate a new technique for absolute distance measurement with a femtosecond frequency comb laser, based on unraveling the output of an interferometer to distinct comb modes with 1 GHz spacing. From the fringe patterns that are captured with a camera, a distance is derived by combining spectral and homodyne interferometry, exploiting about 9000 continuous wave lasers. This results in a measurement accuracy far within an optical fringe (λ/30), combined with a large range of nonambiguity (15 cm). Our technique merges multiwavelength interferometry and spectral interferometry, within a single scheme.

Determinants of condom use among HIV-positive men who have sex with men.

The main objectives of this study were to identify the determinants of condom use among HIV-positive men having anal sex with HIV-negative men or men of unknown HIV status and moderators of the intention-behaviour relationship. A cohort of 237 sexually active HIV-positive men having sex with men was followed over a period of six months. The cognitive variables measured were guided by an extended version of the theory of planned behaviour. Results indicated that past behaviour (odds ratio [OR] = 9.75; 95% confidence interval [CI]: 4.48-21.26), intention (OR = 3.13; 95% CI: 1.25-7.81), self-efficacy (OR = 3.62; 95% CI: 1.40-9.37) and use of sex drugs (OR = 0.16; 95% CI: 0.06-0.45) contributed to the prediction of 100% condom use. Self-efficacy also interacted with intention as a significant moderator of the intention-behaviour relationship (OR = 20.96; 95% CI: 2.90-151.51). Interventions promoting condom use should increase self-efficacy to use condoms and target users of sex drugs.