[1] King Saud Univ, Univ Sleep Disorders Ctr, Dept Med, Coll Med, Riyadh, Saudi Arabia
[2] King Saud Univ, Dept Family & Community Med, Coll Med, Riyadh, Saudi Arabia
[3] Sunnybrook Hlth Sci Ctr, Sunnybrook Res Inst, Trauma Emergency & Crit Care Program, Toronto, ON, Canada