[1] Univ Libre Bruxelles, Ecole Sante Publ, Ctr Rech Epidemiol Biostat & Rech Clin, Brussels, Belgium
[2] Inst Rech Sci Sante, Dept Biomed & Sante Publ, Ouagadougou, Burkina Faso
[3] Ctr Hosp Reg Banfora, Serv Med, Banfora, Burkina Faso
[4] Inst Rech Sci Sante, Unite Rech Clin Nanoro, Ctr Natl Rech Sci & Technol, Ouagadougou, Burkina Faso
[5] CNRFP, Inst Natl Sante Publ INSP, Ouagadougou, Burkina Faso