1. Department of Psychiatry, Inje University Haeundae Paik Hospital, Busan, Korea.
2. Department of Psychiatry, Veteran Health Service Medical Center, Seoul, Korea.
3. Department of Psychiatry, Bugok National Hospital, Changyeong, Korea.
4. Department of Psychiatry, College of Medicine, Chosun University, Gwangju, Korea.
5. Department of Psychiatry, School of Medicine, Wonkwang University, Iksan, Korea.
6. Department of Psychiatry, Chonnam National University Medical School, Gwangju, Korea.
7. Department of Psychiatry, College of Medicine, Dong-A University, Busan, Korea.
8. Department of Psychiatry, Kangwon University School of Medicine, Chuncheon, Korea.
9. Department of Psychiatry, Hanyang University Guri Hospital, Guri, Korea.