1. Department of Neurology, Soonchunhyang University College of Medicine, Seoul, South Korea
2. Department of Neurology, Seoul National University Hospital, Seoul, South Korea
3. Department of Neurology, Kyung Hee University Hospital at Gangdong, Seoul, South Korea
4. Department of Neurology, National Center for Mental Health, Seoul, South Korea
5. Department of Neurology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, South Korea
6. Department of Neurology, Gangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, South Korea
7. Program in Neuroscience, Seoul National University College of Medicine, Seoul, South Korea
8. Department of Neurology, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, South Korea
9. Protein Metabolism Medical Research Center, Seoul National University College of Medicine, Seoul, South Korea
10. Neuroscience Research Institute, Seoul National University College of Medicine, Seoul, South Korea
11. Department of Biomedical Engineering, College of Health Science, Yonsei University, Wonju, South Korea
12. Minnesota Regional Sleep Disorders Center, and Department of Psychiatry, Hennepin County Medical Center and University of Minnesota Medical School, Minneapolis, MN