1. Sleep Disorders Center, Mayo Clinic College of Medicine, Rochester, MN
2. Sleep and Chronobiology Program, Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA
3. Department of Neurology, Louisiana State University Medical Center, Shreveport, LA
4. Sleep Disorders Clinic and Research Center and Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA
5. Sleep Medicine Services, Wynnewood, PA
6. Stanford University Sleep Disorders Clinic, Stanford, CA
7. Sleep Disorders Center, Mayo Clinic College of Medicine Rochester, MN
8. Department of Medicine, University of Minnesota, Minneapolis, MN
9. Department of Psychiatry and Behavioral Sciences, Center for Narcolepsy, Stanford University School of Medicine, Stanford, CA