[1] Univ Calif San Francisco, Div Infect Dis, Dept Med, San Francisco, CA 94143 USA
[2] Univ Calif Berkeley, Sch Publ Hlth, Dept Epidemiol, Berkeley, CA 94720 USA
[3] Brody Sch Med, Ctr Hlth Dispar Res, Greenville, NC USA
[4] Brody Sch Med, Dept Publ Hlth, Greenville, NC USA
[5] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[6] Univ Calif San Francisco, Dept Med, Div Hematol & Oncol, San Francisco, CA 94143 USA