1. Department of Medicine and Center for Sleep and Circadian Neurobiology, University of Pennsylvania, Philadelphia, PA;
2. Department of Respiration, The Second Hospital of Shanxi Medical University, Taiyuan,China;
3. Division of Sleep Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA,
4. YRT Ltd, Winnipeg, Manitoba, Canada;
5. Sleep Disorders Centre, University of Manitoba, Winnipeg, Manitoba;
6. Department of Medicine, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA