1. Department of Medicine, Indiana University, Indianapolis, Indiana, and School of Medicine, Moi University, Eldoret, Kenya.
2. School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa.
3. International Center for AIDS Care and Treatment Programs, Columbia University, New York, New York.
4. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
5. INSERM U593, Institut de Santé Publique Epidémiologie et Développement, Université Victor Segalen Bordeaux, Bordeaux, France.
6. Institut de Recherche pour le Développement, UMR 145, Montpellier, France.
7. Hospital Universitario Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
8. Hospital Escola S o Francisco de Assis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
9. Hospital de Clinicas de Porto Alegre, Federal University of Rio Grande do Sul, Brazil.
10. Office of the Director, National Institutes of Health, Bethesda, Maryland.
11. University of North Carolina Project, Lilongwe, Malawi.
12. Department of Social Medicine, University of Bristol, Bristol, U.K.
13. Epidemiology Prevention and Interventions Center, University of California at San Francisco, San Francisco, California.