1. Sleep Center Peking University People's Hospital Beijing China
2. Division of Sleep Medicine Department of Medicine University of Pennsylvania School of Medicine Philadelphia PA USA
3. Department of Biostatistics, Epidemiology, and Informatics Center for Clinical Epidemiology and Biostatistics University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
4. Sleep Medicine and Research Center St. Luke's Hospital Chesterfield MO USA
5. Villanova University Villanova PA USA
6. Department of Psychiatry Stanford University Palo Alto CA USA
7. Department of Psychiatry and Human Behavior University of California Irvine CA USA
8. Center for Sleep Medicine and Sleep Research University of Wisconsin–Madison Madison WIS USA
9. Division of Sleep and Circadian Disorders Department of Medicine Brigham and Women's Hospital Boston MA USA
10. Division of Sleep Medicine Harvard Medical School Boston MA USA
11. Division of Pulmonary Critical Care, and Sleep Medicine Beth Israel Deaconess Medical Center Boston MA USA
12. Department of Medicine Corporal Michael J. Crescenz Veterans Affairs Medical Center Philadelphia PA USA