[1] Univ S Florida, Coll Publ Hlth, Dept Epidemiol & Biostat, Tampa, FL 33612 USA
[2] Univ S Florida, Coll Med, Dept Obstet & Gynecol, Tampa, FL 33612 USA
[3] Univ S Florida, Coll Publ Hlth, Dept Community & Family Hlth, Tampa, FL 33612 USA
[4] Univ Bamako, Ctr TB & AIDS Res Mali SEREFO, Bamako, Mali
[5] Univ Rochester, Dept Community & Prevent Med, Rochester, NY USA