1. Department of Psychiatry Tokyo Women's Medical University School of Medicine Shinjuku‐ku Japan
2. Department of Sleep‐wake disorders NIMH National Center of Neurology and Psychiatry Tokyo Japan
3. Department of Medical Technology School of Health Science Tokyo University of Technology Tokyo Japan
4. Department of Neuropsychiatry School of Medicine Kurume University Kurume Japan
5. Division of Diabetes, Metabolism and Endocrinology Department of Medicine Toho University School of Medicine Tokyo Japan
6. Yoyogi Sleep Disorder Center Tokyo Japan
7. Center for Sleep Disorders National Center of Neurology and Psychiatry Tokyo Japan
8. Department of Psychiatry Fujita Health University School of Medicine Shimotsuga‐gun Japan
9. Department of Neurology Dokkyo Medical University Mibu Japan
10. Department of Neuropsychiatry Faculty of Medicine Kagawa University Kagawa Japan
11. Department of Psychiatry Jikei University Tokyo Japan
12. Department of Neuropsychiatry Akita University Graduate School of Medicine Akita Japan
13. Department of Cardiology Tokyo Women's Medical University School of Medicine Shinjuku‐ku Japan
14. Department of Psychiatry and Neurosciences Hiroshima University Hiroshima Japan