1. National Radiation Protection Authority of Namibia, Ministry of Health and Social Services , Windhoek, Namibia
2. Ghana Atomic Energy Commission , Accra, Ghana
3. Department of Radiology, Kenyatta National Hospital , Nairobi Kenya
4. University Teaching Hospital-Senegal, Institut Curie, Hôpital Universitaire le Dantec , BP, Dakar, Senegal
5. Nuclear Medicine Department, Windhoek Central Hospital , Windhoek, Namibia
6. Kenya Nuclear Regulatory Authority , Nairobi, Kenya
7. Radiation Protection of Patients Unit, Radiation Safety and Monitoring Section, Division of Radiation, Transport and Waste Safety, Department of Nuclear Safety and Security, International Atomic Energy Agency (IAEA) , Vienna International Centre, Vienna, Austria