[1] Univ Geneva, Fac Med, Geneva, Switzerland
[2] Ctr Int Rech Enseignements & Soins Milieu Trop CI, Akonolinga, Cameroon
[3] Univ Yaounde I, Cameroon Soc Epidemiol CaSE, Yaounde, Cameroon
[4] Univ Yaounde I, Fac Med & Biomed Sci, Yaounde, Cameroon
[5] Geneva Univ Hosp, Div Trop & Humanitarian Med, Geneva, Switzerland