1. Division of Sleep Medicine, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
2. Carolinas Healthcare Medical Group Sleep Services, Charlotte, North Carolina
3. University of Michigan Sleep Disorders Center, University of Michigan, Ann Arbor, Michigan
4. Saint Thomas Medical Partners -Sleep Specialists, Nashville, Tennessee
5. Division of Pulmonary/Sleep/Critical Care, Mayo Clinic, Rochester, Minnesota
6. Johns Hopkins University, School of Medicine, Baltimore, Maryland
7. University of Pittsburgh, Pittsburgh, Pennsylvania
8. SLUCare Sleep Disorders Center
9. Department of Neurology, Saint Louis University, St. Louis, Missouri
10. Veteran Affairs Greater Los Angeles Health System, North Hills, California and David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California
11. Department of Pediatrics, Case Western Reserve University, University Hospitals - Cleveland Medical Center, Cleveland, Ohio
12. Wayne State University, Detroit, Michigan