1. Nuclear Medicine Research Infrastructure (NuMeRI), Steve Biko Academic Hospital, Pretoria 0001, South Africa
2. Department of Nuclear Medicine, University of Pretoria & Steve Biko Academic Hospital, Private Bag X169, Pretoria 0001, South Africa
3. Department of Radiology and Imaging Sciences, Emory University, Atlanta, GA 30322, USA
4. Department of Nuclear Medicine, King Hussein Cancer Center (KHCC), Al-Jubeiha P.O. Box 1269, Amman 11941, Jordan