1. Department of Neurology, Washington University School of Medicine, Saint Louis, MO
2. Department of Neurology, University of Washington School of Medicine, Seattle, WA
3. St. Luke's Hospital Sleep Medicine and Research Center, Saint Louis, MO
4. Sleep Disorders Clinic, VA Portland Health Care System; Departments of Medicine, Neurology, and Behavioral Neuroscience, and the Oregon Institute of Occupational Health Sciences, Oregon Health & Science University, Portland, OR