1. San Francisco VA Healthcare System, San Francisco, California
2. Department of Medicine, University of California, San Francisco, California
3. VA Portland Healthcare System, Portland, Oregon
4. Department of Otolaryngology, Oregon Health & Science University, Portland, Oregon
5. VA San Diego Healthcare System, San Diego, California
6. Department of Medicine, University of California San Diego, La Jolla, California
7. Department of Neurology, Oregon Health & Science University, Portland, Oregon
8. Philadelphia VA Medical Center, Philadelphia, Pennsylvania
9. Division of Sleep Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
10. Center for Sleep and Circadian Neurobiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
11. VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania
12. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
13. Department of Medical Informatics and Clinical Epidemiology, Oregon Health & Science University, Portland, Oregon
14. Dallas VA Medical Center, Dallas, Texas
15. Department of Medicine, UT Southwestern School of Medicine, Dallas, Texas