1. Department of Psychiatry, Depression Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
2. Department of Health Sciences & Technology, Department of Clinical Research Design and Evaluation, and Department of Medical Device Management and Research, Samsung Advanced Institute for Health Sciences & Technology (SAIHST), Seoul, Republic of Korea.
3. Depression Clinical and Research Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
4. Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea.
5. Department of Psychiatry and Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
6. Department of Psychiatry, Seoul National University Bundang Hospital, College of Medicine, Seoul National University, Seoul, Republic of Korea.
7. Department of Psychiatry, Gyeongsang National University College of Medicine, Jinju, Republic of Korea.
8. Department of Psychiatry, Pusan National University School of Medicine, Busan, Republic of Korea.
9. Department of Psychiatry, Chonnam National University College of Medicine, Gwangju, Republic of Korea.
10. Department of Psychiatry, Seoul National Hospital, Seoul, Republic of Korea.
11. Department of Psychiatry, Korea University College of Medicine, Seoul, Republic of Korea.