1. Neurology, University of Baghdad, Al-Kindy College of Medicine, Baghdad, Iraq
2. Neurology, Bharati Vidyapeeth Medical College, Pune
3. Internal Medicine, Government Medical College, Omandurar, India
4. Multan Medical and Dental College, Multan, Pakistan
5. Department of Medicine, Al Manhal University Academy of Science, Khartoum, Sudan