1. Department of Psychiatry, Depression Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
2. Depression Clinical and Research Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
3. Department of Psychiatry, Seoul Paik Hospital, Inje University School of Medicine, Seoul, Republic of Korea.
4. Stress Research Institute, Inje University, Seoul, Republic of Korea.
5. OR/RWD Team, Corporate Affairs·Health & Value Division, Pfizer Korea, Seoul, Republic of Korea.
6. Department of Psychiatry, Gil Medical Center, Gachon Medical School, Incheon, Republic of Korea.
7. Department of Psychiatry, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Republic of Korea.
8. Department of Psychiatry, Konkuk University School of Medicine, Seoul, Republic of Korea.
9. Department of Psychiatry, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.