E.Nshimiyimana | AFENET Rwanda | nshimiyimanaemmanuel78@gmail.com 
S. Semakula | Rwanda Biomedical Center | semakulam@gmail.com 
J.Ntaganira | University of Rwanda-School of Public Health| jntaganira@nursph.org 
V.Ndahindwa | University of Rwanda-School of Public Health | ndahindwa@nursph.org 

