1. Department of Psychiatry, King Saud University, Riyadh, Saudi Arabia
2. College of Medicine, King Saud University, Riyadh, Saudi Arabia
3. Centre for Mental Health, University Health Network, Department of Psychiatry, University of Toronto, Toronto, ON, Canada
4. Department of Mental Health, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
5. Department of Neurology, King Saud University, Riyadh, Saudi Arabia