[1] Univ Lome, Lome, Togo
[2] Ctr Africain Rech Epidemiol & Sante Publ, Lome, Togo
[3] Programme PACCI Site ANRS Cote Ivoire, Abidjan, Cote Ivoire
[4] Univ Lome, Lab Biol Mol, Lome, Togo
[5] Programme Natl Lutte VIH Sida & Infect Sexuelleme, Lome, Togo
[6] Univ Bordeaux, INSERM, U1219 Bordeaux Populat Hlth Res 6, Bordeaux, France