Authors: Mounkaila A Billo; Eric S Johnson; Seydou O Doumbia; Belco Poudiougou; Issaka Sagara; Sory I Diawara; Mahamadou Diakité; Mouctar Diallo; Ogobara K Doumbo; Anatole Tounkara; Janet Rice; Mark A James; Donald J Krogstad Journal: Am J Epidemiol Date: 2012-10-01 Impact factor: 4.897