J. Mukamurigo | University of Rwanda School of Public Health | jmukama@nursph.org 
G.Rukundo | Rwanda Biomedical Center | gilrukundo@gmail.com 
J.D. Sinayobye | AFENET Rwanda | jsinayobye@afenet.net 
J. Ntaganira | University of Rwanda School of Public Health | jntaganira@nursph.org