[1] Minist Publ Hlth, Natl Publ Hlth Lab, Yaounde, Cameroon
[2] Distant Prod House Univ, Lewes, DE USA
[3] Univ Douala, Higher Inst Hlth Profess, Fac Med & Pharmaceut Sci, Yaounde, Cameroon
[4] Univ Douala, Higher Inst Sci & Tech Appl Hlth, Fac Med & Pharmaceut Sci, Yaounde, Cameroon
[5] Univ Lisala, Fac Hlth Sci, Lisala, Mongala, DEM REP CONGO
[6] Univ Yaounde I, Fac Med & Biomed Sci, Yaounde, Cameroon
[7] Catholic Univ Cent Africa, Sch Hlth Sci, Yaounde, Cameroon
[8] Univ Douala, Higher Inst Med Technol, Fac Med & Pharmaceut Sci, Yaounde, Cameroon
[9] Univ Buea, Fac Hlth Sci, Buea, Cameroon
[10] Chantal BIYA Int Reference Ctr Res HIV AIDS preven, Yaounde, Cameroon