Daniel l Rudasingwa l Kabutare Hospital I rudan10@yahoo.fr l 
Hosee l Niyompano l Rwanda Biomedical Centre l niyose04@gmail.com l
Jean Claude I NIYOYITA l African Field Epidemiology Network l jniyoyita@afenet.net I
Emmanuel l Nshimiyimana l African Field Epidemiology Network l enshimiyimana@afenet.net l