Muhammed | Ibrahim | Ahmadu Bello University, Zaria, Nigeria | firstmsibrahim@yahoo.com
Muhammad | Balogun | African Field Epidemiology Network, Nigeria | msbalogun@afenet.net
Elizabeth | Adedire | African Field Epidemiology Network, Nigeria | aededire@afenet.net
Hauwa | Lawan | University of Maiduguri Teaching Hospital, Nigeria | drhaml@yahoo.com