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