1. Department of Psychiatry and Behavioral Medicine, Stanford University Center for Sleep Sciences and Medicine, Stanford University, CA
2. Department of Electrical Engineering, Biomedical Engineering, Technical University of Denmark, Lyngby, Denmark
3. Department of Clinical Neurophysiology, Danish Center for Sleep Medicine, Rigshospitalet, Copenhagen, Denmark
4. Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison, WI