[1] Univ Dschang, Fac Sci, Dept Biomed Sci, Dschang, Cameroon
[2] Swiss Trop & Publ Hlth Inst, Dept Epidemiol & Publ Hlth, Basel, Switzerland
[3] Minist Publ Hlth, Div Hlth Operat Res, Nonthaburi, Cameroon
[4] Univ Geneva, Fac Med, Inst Social & Prevent Med, Geneva, Switzerland
[5] Univ Yaounde I, Fac Med, Yaounde, Cameroon
[6] MA SANTE Meileur Acces Soins Sante, Dept Res & Training, Yaounde, Cameroon
[7] Univ Hosp, Dept Ambulatory Care & Community Med, Infect Dis Serv, Lausanne, Switzerland