1. Department of Biobehavioral Health Sciences, College of Nursing, University of Illinois at Chicago, Chicago, Illinois
2. School of Nursing, Shanghai Jiao Tong University, Shanghai, China
3. Center for Sleep and Circadian Neurobiology and
4. Division of Sleep Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania; and
5. School of Medicine, John Hopkins University, Baltimore, Maryland