[1] Univ Calif Irvine, Dept Med, Div Hematol Oncol, Manhattan Beach, CA USA
[2] Univ Calif Irvine, Dept Epidemiol & Biostat, Irvine, CA USA
[3] Univ Southern Calif, Ctr Genet Epidemiol, Dept Populat & Publ Hlth Sci, Los Angeles, CA 90007 USA
[4] Univ Calif Los Angeles, David Geffen Sch Med, AIDS Inst, Los Angeles, CA 90095 USA
[5] Univ Med Ctr Groningen, Groningen, Netherlands
[6] Univ Groningen, Univ Med Ctr Groningen, Dept Pathol & Med Biol, Groningen, Netherlands
[7] Walter Reed Army Inst Res, Stat & Epidemiol Branch, Silver Spring, MD USA
[8] UCLA, David Geffen Sch Med, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA 90095 USA