1. Department of Clinical Sciences, College of Medicine, Majmaah University, Al Majmaah, Riyadh, KSA
2. Department of Family Medicine, College of Medicine, Majmaah University, Al Majmaah, Riyadh, KSA
3. Department of Public Health and Community Medicine, College of Medicine, Majmaah University, Al Majmaah, Riyadh, KSA
4. Department of Neurosciences, King Faisal Specialist Hospital and Research Center, Riyadh, KSA