[1] Johns Hopkins Univ, Dept Epidemiol, Bloomberg Sch Publ Hlth, Baltimore, MD 21205 USA
[2] Johns Hopkins Univ, Sch Med, Dept Pathol, Baltimore, MD 21205 USA
[3] NIH, Off AIDS Res, Bethesda, MD USA
[4] Rutgers State Univ, Dept Stat, Piscataway, NJ USA
[5] Rutgers State Univ, Inst Hlth Hlth Care Policy & Aging Res, Piscataway, NJ USA
[6] Univ N Carolina, Dept Microbiol & Immunol, Chapel Hill, NC USA
[7] Univ Malawi, Coll Med, Dept Obstet & Gynecol, Zomba, Malawi
[8] Univ Malawi, Coll Med, Dept Pediat, Zomba, Malawi
[9] Johns Hopkins Univ, Coll Med, Minist Hlth, Res Project, Blantyre, Malawi