1. The University of Adelaide, School of Electrical and Electronic Engineering, Adelaide, South Australia, Australia
2. The University of Adelaide, Discipline of Psychiatry, Adelaide Medical School, Adelaide, South Australia, Australia
3. Sleep Disorders Center, Department of Neurology, University of Parma, Parma, Emilia-Romagna, Italy
4. Center for Chronic Disease Outcomes Research, Veterans Affairs Medical Center, Minneapolis, Minnesota
5. Department of Medicine and Division of Epidemiology, University of Minnesota, Minneapolis, Minnesota
6. California Pacific Medical Center Research Institute, San Francisco, California
7. Departments of Medicine and Neurology, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts