1. Department of Pathology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
2. Histocenter, Khartoum, Sudan
3. Department of Pathology, Faculty of Medicine, Omdurman Islamic University, Khartoum, Sudan
4. Department of Surgery, Faculty of Medicine, University of Khartoum, Khartoum, Sudan
5. Department of Surgery, Faculty of Medicine, Al-Neelain University, Khartoum, Sudan
6. Department of Postgraduate Medical Studies, University of Khartoum, Khartoum, Sudan
7. Pathology Department, Sudan Medical Specialization Board, Khartoum, Sudan
8. Department of Medicine and HIV Metabolic Clinic, Milton Keynes University Hospital NHS Foundation Trust, Eaglestone, Milton Keynes, Buckinghamshire, United Kingdom