[1] Univ Calif Los Angeles, David Geffen Sch Med, UCLA AIDS Inst, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Ctr Prevent Res, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Dept Microbiol Iimmunol & Mol Genet, Los Angeles, CA 90095 USA
[4] Univ Calif Los Angeles, Sch Publ Hlth, Dept Biostat, Los Angeles, CA 90024 USA
[5] Harvard Univ, Sch Med, Dept Med, Massachusetts Gen Hosp, Boston, MA USA
[6] Washington State Univ, Dept Math, Pullman, WA 99164 USA
[7] Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA
[8] Tower Canc Res Fdn, Beverly Hills, CA USA