1. Department of Psychiatry, Yong-In Mental Hospital, Yongin, Republic of Korea.
2. Institute of Mental Health, Hanyang University, Seoul, Republic of Korea.
3. Department of Psychiatry, School of Medicine, Chonnam National University, Gwangju, Republic of Korea.
4. Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
5. Department of Psychiatry, College of Medicine, Korea University, Seoul, Republic of Korea.
6. Department of Psychiatry, Keimyung University School of Medicine, Daegu, Republic of Korea.
7. Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
8. Department of Psychiatry, College of Medicine, Hanyang University, Seoul, Republic of Korea.