[1] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD 21205 USA
[2] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD 21205 USA
[3] Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Mol Microbiol & Immunol, Baltimore, MD 21205 USA
[4] Ctr Dis Control & Prevent, HIV & Retrovirol Branch, Div AIDS Sexually Transmitted Dis, Atlanta, GA USA
[5] Ctr Dis Control & Prevent, TB Lab Res, Natl Ctr HIV AIDS Sexually Transmitted Dis & TB P, Atlanta, GA USA
[6] Henry M Jackson Fdn, Rockville, MD USA
[7] Army Hlth Res Ctr, Yaounde, Cameroon
[8] Walter Reed Army Inst Res, Rockville, MD USA