1 Department of Family Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
2 The University Sleep Disorders Center, Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
3 The Strategic Technologies Program of the National Plan for Sciences and Technology and Innovation in the Kingdom of Saudi Arabia, Riyadh, Saudi Arabia.
4 King Fahad Cardiac Center, King Saud University, Riyadh, Saudi Arabia.