1. Neurology Department, Ibn Sina Hospital, Safat, Kuwait City, Kuwait
2. Faculty of Medicine, Kuwait University, Safat, Kuwait City, Kuwait
3. Division of Neurology, Department of Medicine, Amiri Hospital, Sharq, Kuwait City, Kuwait
4. Medicine Department, Farwaniya Hospital, Farwaniya, Kuwait
5. Neuropsychiatry Department, Faculty of Medicine, Al-Minia University, Minia City, Minia, Egypt