1. Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
2. Sleep Disorders Center, Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
3. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland
4. University of Arizona Health Sciences, Center for Sleep and Circadian Sciences and Division of Pulmonary and Clinical Care Medicine, University of Arizona, Tucson, Arizona
5. Uniformed Services University of the Health Sciences, Bethesda, Maryland
6. Sleep Disorders Center, Walter Reed National Military Medical Center, Bethesda, Maryland
7. Division of Behavioral Biology, Walter Reed Army Institute of Research, Silver Spring, Maryland
8. Pharmaceutical Research Computing, Department of Pharmaceutical Health Services Research, University of Maryland School of Pharmacy, Baltimore, Maryland