[1] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Epidemiol, Chapel Hill, NC 27599 USA
[2] Univ N Carolina, Dept Stat & Operat Res, Chapel Hill, NC 27599 USA
[3] Duke Univ, Med Ctr, Div Infect Dis & Int Hlth, Durham, NC 27708 USA
[4] Univ N Carolina, Dept Geog, Chapel Hill, NC 27599 USA
[5] Univ N Carolina, Carolina Populat Ctr, Chapel Hill, NC 27599 USA
[6] Univ Kinshasa, Fac Med, Ecole Sante Publ, Kinshasa, DEM REP CONGO
[7] Programme Natl Lutte SIDA & IST, Kinshasa, DEM REP CONGO