1. Program in Human Sexuality, Department of Family Medicine and Community Health, University of Minnesota Medical School, Minneapolis, Minnesota, USA
2. Department of Neurosciences, University of Sheffield, Western Bank, Sheffield, United Kingdom
3. School of Public Health, Curtin University, Bentley, Australia
4. Asociación Mexicana para la Salud Sexual, Tlalpan, Mexico and Universidad Nacional Autónoma de México Mexico City, Mexico
5. Universidad Central of Venezuela, Caracas, Venezuela
6. State University of New York–Syracuse, Syracuse, New York, USA
7. Chief Department of Medical Sexology, Centro de Investigaciones Psiquiatricas, Psicologicas y Sexologicas de Venezuela, Instituto de Investigacion y Postgrado, Caracas, Venezuela
8. University of Rome, Rome, Italy