1. Division of Sleep Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA;
2. Corporal Michael Crescenz VA Medical Center, Philadelphia, PA, USA;
3. Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women’s Hospital, Boston, MA, USA;
4. Division of Sleep Medicine, Harvard Medical School, Boston, MA, USA;
5. Department of Management and Organization, Foster School of Business, University of Washington, Seattle, WA, USA;
6. Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA;
7. Centre for Study and Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, Quebec, Canada;
8. Appleton Institute, Central Queensland University, Wayville, SA, Australia;
9. Sleep Disorders and Research Center, Henry Ford Hospital, Detroit, MI, USA;
10. Fatigue Countermeasures Laboratory, NASA Ames Research Center, Moffett Field, CA, USA;
11. STRONG STAR ORU, Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center, San Antonio, TX, USA;
12. Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA, USA;
13. Center for Circadian and Sleep Medicine, Department of Neurology, Division of Sleep Medicine, Northwestern University, Chicago, IL, USA;
14. Centre for Sleep and Human Performance, Calgary, Alberta, Canada;
15. Operations Research Department, Naval Postgraduate School, Monterey, CA, USA;
16. American Academy of Sleep Medicine, Darien, IL, USA;
17. Darien, Illinois, USA;
18. Sleep and Performance Research Center, Washington State University, Spokane, WA, USA;
19. Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, USA