1. Workplace Mental Health Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea.
4. Department of Psychiatry, Yonsei University Wonju Severance Christian Hospital, Wonju, Korea.
5. Department of Psychiatry, Dongguk University Gyeongju Hospital, Gyeongju, Korea.
6. Department of Psychiatry, Gyeongsang National University School of Medicine, Jinju, Korea.
7. Department of Neuropsychiatry, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
8. Department of Psychiatry, College of Medicine, Chungnam National University, Daejeon, Korea.
9. Department of Psychiatry, School of Medicine, Konkuk University, Konkuk University Chungju Hospital, Chungju, Korea.
10. Department of Neuropsychiatry, Jeju National University Hospital, Jeju, Korea.
11. Department of Psychiatry, School of Medicine, Konkuk University, Konkuk University Medical Center, Seoul, Korea.
12. Department of Neuropsychiatry, Kyunggi Provincial Hospital for the Elderly, Yongin, Korea.
13. Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Korea.
14. Department of Psychiatry, Inje University Sanggye Paik Hospital, Seoul, Korea.
15. Department of Psychiatry, Dankook University Hospital, Cheonan, Korea.
16. Department of Psychiatry, Kangwon National University School of Medicine, Chuncheon, Korea.
17. Department of Brain and Cognitive Science, Seoul National University College of Natural Sciences, Seoul, Korea.
18. Institute of Human Behavioral Medicine, Seoul National University Medical Research Center, Seoul, Korea.