Authors: Ako A Agbor; Jean Joel R Bigna; Serges Clotaire Billong; Mathurin Cyrille Tejiokem; Gabriel L Ekali; Claudia S Plottel; Jean Jacques N Noubiap; Hortence Abessolo; Roselyne Toby; Sinata Koulla-Shiro Journal: PLoS One Date: 2014-12-15 Impact factor: 3.240