1. Department of Medicine University of California San Diego La Jolla CA USA
2. National Drug and Alcohol Research Center University of New South Wales Sydney NSW Australia
3. Yale School of Medicine Yale University New Haven CT USA
4. Centro de Investigación Interdisciplinaria en Sexualidad SIDA y SociedadUniversidad Peruana Cayetano Heredia Lima Peru
5. Modelling and Biostatistics Burnet Institute Melbourne VIC Australia
6. Yale University Center for Interdisciplinary Research on AIDS New Haven CT USA
7. Centre of Excellence in Research on AIDS Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
8. Population Health Sciences University of Bristol Bristol United Kingdom