1. Faculty of Medicine University of Khartoum Khartoum Sudan
2. Faculty of Medicine, Medani Heart Centre University of Bakht Alruda Sudan Wad Medani
3. Faculty of Medicine Omdurman Islamic University Khartoum Sudan
4. Wad Medani College of Medical Science and Technology Wad Medani Sudan
5. Faculty of Medicine University of Bahri Khartoum Sudan
6. Faculty of Medicine University of Gezira Wad Medani Sudan