Affiliation: | 1.Pulmonary Division-ICU, Department of Medicine, Sleep Disorders Center, King Saud University for Health Sciences, McGill University, King Abdulaziz Medical City, PO Box 101830*11665, Riyadh, Saudi Arabia ;2.Department of Epidemiology and Biostatistics, College of Public Health and Health Informatics, King Saud University for Health Sciences, Riyadh, Saudi Arabia ;3.College of Medicine, King Saud University for Health Sciences, Riyadh, Saudi Arabia ;4.King Abdulaziz Medical City, Riyadh, Saudi Arabia ; |