1. Division of Adolescent Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
2. Department of Sociology, Indiana University Purdue University-Indianapolis, Indianapolis, IN, USA
3. Department of Family Medicine and Community Health, University of Minnesota Medical School, Minneapolis, MN, USA
4. Department of Dermatology, Venereology & Andrology, Faculty of Medicine, Sohag University, Sohag, Egypt
5. Discipline of Health Promotion & Sexology, Curtin School of Population Health, Curtin University, Perth, Australia
6. Amref International University, Nairobi, Kenya
7. Department of Behavioural and Cognitive Sciences, University of Luxembourg, Esch-sur-Alzette, Luxembourg
8. Department of Infectious Diseases, University Hospital LMU Munich, Munich, Germany
9. Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
10. Department of Public Health and Primary Care, University of Ghent, Ghent, Belgium
11. Foundation for Professional Development, Rome, Italy
12. Centre for Medical Science and Technology Studies, University of Copenhagen, Copenhagen, Denmark
13. Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
14. Department of Psychology, University of Basel, Basel, Switzerland
15. Department of Public Health Education, University of North Carolina Greensboro, Greensboro, NC, USA