1. Elson S. Floyd College of Medicine, Department of Biomedical Sciences, Washington State University, Spokane, WA
2. Sleep and Performance Research Center, Washington State University
3. Department of Biological and Medical Psychology, University of Bergen, Norway
4. Mathematics and Computer Science, Whitworth University, Spokane, WA
5. Department of Basic Medical Sciences and Psychiatry, University of Arizona College of Medicine-Phoenix, Phoenix, AZ