1. Department of Psychiatry, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
2. Department of Psychiatry, Ilsan Paik Hospital, College of Medicine, Inje University, Goyang, Republic of Korea.
3. Department of Psychiatry, Seoul National Hospital, Seoul, Republic of Korea.
4. Department of Psychiatry, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Republic of Korea.
5. Department of Psychiatry, School of Medicine, Konkuk University, Chungju, Republic of Korea.
6. Shinsegae Hospital, Gimje, Republic of Korea.
7. Namwon Sungil Mental Hospital, Namwon, Republic of Korea.
8. Department of Psychiatry, Stress Research Institute, Inje University College of Medicine, Seoul Paik Hospital, Seoul, Republic of Korea.
9. Department of Psychiatry, College of Medicine, Hallym University, Anyang, Republic of Korea.
10. Department of Psychiatry, College of Medicine, University of Ulsan, Seoul, Republic of Korea.
11. Department of Psychiatry, College of Medicine, Chung-Ang University, Seoul, Republic of Korea.