1. Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts;
2. Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, South Korea;
3. Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York; and
4. Research Institute, California Pacific Medical Center, San Francisco, California