[1] Univ Calif Los Angeles, Fielding Sch Publ Hlth, Dept Epidemiol, 650 Charles E Young Dr South,CHS St 41-275, Los Angeles, CA 90095 USA
[2] Univ Kinshasa, Inst Natl Rech Biomed, Kinshasa, DEM REP CONGO
[3] Univ Kinshasa, Fac Med, Kinshasa, DEM REP CONGO
[4] Childrens Natl Med Ctr, Childrens Res Inst, Dept Genet Med Res, Washington, DC 20010 USA
[5] Blood Syst Res Inst, San Francisco, CA USA
[6] Univ Calif San Francisco, Dept Lab Med, San Francisco, CA 94143 USA
[7] Vet Affairs Med Ctr, Mol Epidemiol Res Lab, Durham, NC USA
[8] Univ Calif Los Angeles, DRC Res Program, Los Angeles, CA USA
[9] Minist Sante Publ, Direct Lutte Maladie, Kinshasa, DEM REP CONGO
[10] Univ Kinshasa, Ecole Sante Publ, Kinshasa, DEM REP CONGO