1. Department of Psychiatry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
2. Department of College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
3. Department of Research Support Unit, King Fahad Hospital of the University, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
4. Department of Family and Community Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
5. Department of Internal Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
6. Department of Geriatrics and Gerontology, Ain Shams University, Cairo, Egypt
7. Department of Neurology, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia