1. Department of Pathology, Makerere College of Health Sciences, P.O. Box 7072, Kampala, Uganda
2. The University of Rwanda, P.O. Box 4285, Kigali, Rwanda
3. Kilimanjaro Christian Medical Center (KCMC), P.O. Box 3010, Kilimanjaro, Tanzania
4. Ocean Road Cancer Institute (ORCI), P.O. BOX 3592, Dar-es-salaam, Tanzania