[1] Univ Chicago, Med Ctr, Chicago, IL 60637 USA
[2] Bucksbaum Inst Clin Excellence, Chicago, IL USA
[3] Mt Sinai Hosp, Sinai Urban Hlth Inst, Chicago, IL USA
[4] Indiana Univ Sch Med, Indianapolis, IN 46202 USA
[5] Moi Univ, Sch Med, Eldoret, Kenya
[6] Univ Maryland, Sch Med, Inst Human Virol, Baltimore, MD 21201 USA
[7] Univ Maryland, Sch Med, Greenebaum Canc Ctr, Baltimore, MD 21201 USA
[8] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[9] Brasil Grp, Ctr Paulista Oncol & Oncoclin, Rua Maranhao 569-4, BR-01240001 Sao Paulo, Brazil