[1] Univ So Calif, Los Angeles, CA USA
[2] Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA
[3] Univ Calif San Francisco, Dept Med, San Francisco, CA USA
[4] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA
[5] Montgomery Cty Hlth & Human Serv, Silver Spring, MD USA
[6] SUNY Hlth Sci Ctr, Brooklyn, NY 11203 USA
[7] Cornell Univ, Weill Med Coll, New York, NY USA
[8] Cook Cty Hosp, Rush Med Coll, CORE Ctr, Chicago, IL 60612 USA
[9] Thai Red Cross AIDS Res Ctr, Bangkok, Thailand