1. Department of Neurology, Ibn Sina Hospital, P.O. Box 25427, 13115 Safat, Kuwait
2. Department of Medicine, Faculty of Medicine, Kuwait University, P.O. Box 24923, 13110 Safat, Kuwait
3. Department of Neurology and Psychiatry, Minia University, P.O. Box 61519, Minia 61111, Egypt
4. Kuwait Institute for Medical Specialization, P.O. Box 1793, 13018 Safat, Kuwait
5. Kuwait Center for Mental Health, P.O. Box 4081, 13041 Kuwait City, Kuwait
6. Department of Medicine, Mubarak Al-Kabeer Hospital, P.O. Box 24923, 13110 Safat, Kuwait