1. Mount Sinai Medical Center, New York, NY
2. Sleep Disorders Center, University of California, San Fancisco, San Fancisco, CA
3. Boston University School of Medicine, Boston, MA
4. Cincinnati Veterans Affairs Medical Center, Cincinnati, OH
5. Sleep Medicine Section, John D. Dingell VA Medical Center, Detroit, MI
6. Penn State University Hershey Medical Center, Hershey, PA and University of Louisville School of Medicine, Louisville, KY
7. Barrow Neurological Institute at Saint Joseph's, Phoenix, AZ
8. Mayo Clinic, Rochester, MN
9. University of Pittsburgh, Pittsburgh, PA
10. University of Nebraska Medical Center, Omaha, NE
11. Children's Hospital of NY – Presbyterian, Columbia University Medical Center, New York, NY