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