[1] Harvard Med Sch, Massachusetts Gen Hosp, Boston, MA 02115 USA
[2] Univ Penn, Philadelphia, PA 19104 USA
[3] Moi Univ, Acad Model Providing Access Healthcare, Eldoret, Kenya
[4] Indiana Univ, Indianapolis, IN 46204 USA
[5] Minist Hlth Botswana, Gaborone, Botswana
[6] Natl Hosp Abuja, Abuja, Nigeria
[7] Univ Abuja Teaching Hosp, Abuja, Nigeria
[8] Inst Human Virol, Abuja, Nigeria
[9] Univ Bordeaux, Ctr Inserm 1219, Bordeaux, France
[10] Univ Bordeaux, Inst Sante Publ Epidemiol & Dev, Bordeaux, France
[11] Univ Calif San Francisco, San Francisco, CA 94143 USA