1. Department of Infectious Diseases, Amsterdam Infection and Immunity Institute, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
2. Department of Infectious Diseases Research and Prevention Public Health Service of Amsterdam Amsterdam The Netherlands
3. Department of Medical Microbiology, Section of Clinical Virology, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
4. Soa Aids Nederland Amsterdam The Netherlands
5. Department of Social Psychology University of Amsterdam Amsterdam The Netherlands
6. HIV Monitoring Foundation Amsterdam The Netherlands