1. Faculty of Medicine Al Neelain University Khartoum Sudan
2. The National Center for Neurological Sciences Khartoum Sudan
3. Faculty of Medicine Sudan University of Medical Science Khartoum Sudan
4. Faculty of Medicine International University of Africa Khartoum Sudan
5. Faculty of Medicine University of Khartoum Khartoum Sudan
6. Faculty of Medicine National Ribat University Khartoum Sudan
7. Medicine Department Faculty of Medicine and Health Sciences Gadarif University Gadarif Sudan