Gideon. Kwesigabo, Department of Epidemiology and Biostatistics, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania, gpkwesigabo@gmail.com
Ally Hussein, Tanzania Field Epidemiology and Laboratory Training Program, Dar es Salaam, Tanzania, allykhussein@gmail.com
Werema Magoge,  Ministry of Health, Dodoma, Tanzania, magogesolomon@gmail.com