1. Department of Medical Statistics & Epidemiology, Hamad General Hospital and Hamad Medical Corporation, Doha, Qatar
2. Department of Evidence for Population Health Unit, School of Epidemiology and Health Sciences, University of Manchester, Manchester, UK
3. Department of Psychiatry, Rumailah Hospital, Hamad Medical Corporation, Doha, Qatar
4. Department of Psychiatry & Neurology, Weill Cornell Medical College, Doha, Qatar