1. Department of Community Medicine and Behavioural Sciences, University of Kuwait, Kuwait
2. Division of Neurology, Amiri Hospital, Kuwait/ Neurology Clinic, Dasman Diabetes Institute, Kuwait
3. Department of Neurology, Ibn Sina Hospital, Kuwait/ Department of Neurology and Psychiatry, Minia University, Egypt
4. Department of Neurology, Ibn Sina Hospital, Kuwait/ Department of Medicine, University of Kuwait, Kuwait