1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Chulalongkorn University, and Excellence Center for Sleep Disorders, King Chulalongkorn Memorial Hospital, Thai Red Cross Society; Bangkok, Thailand
2. Department of Pulmonary, Allergy, and Critical Care Medicine Respiratory Institute; Cleveland Clinic; Cleveland, OH
3. Department of Hospital Medicine, Medicine Institute and Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH
4. Sleep Disorders Center/ Neurological Institute and Respiratory Institute, Cleveland Clinic, Cleveland, OH