[1] Univ Calif San Francisco, Community Hlth Syst, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Sch Med, Dept Psychiat, Alliance Hlth Project, San Francisco, CA USA
[3] Stanford Univ, Sch Med, PRIDE Study PRIDEnet, Stanford, CA 94305 USA
[4] Stanford Univ, Sch Med, Dept Obstet & Gynecol, Stanford, CA 94305 USA
[5] Univ Calif San Francisco, Dept Med, Ctr AIDS Prevent Studies, San Francisco, CA 94143 USA
[6] Stanford Univ, Dept Med, Sch Med, Div Nephrol, Stanford, CA 94305 USA