1 Sleep and Performance Research Center and Department of Translational Medicine and Physiology, Washington State University Health Sciences, Spokane, WA, USA.
2 Unit for Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, , USA.
3 Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.