1. Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul, Korea
2. Department of Psychiatry, Iksan Hospital, Iksan, Korea
3. Department of Psychiatry, Soonchunhyang University Cheonan Hospital, College of Medicine, Soonchunhyang University, Cheonan, Korea
4. Department of Psychiatry, Soonchunhyang University Gumi Hospital, College of Medicine, Soonchunhyang University, Gumi, Korea
5. Department of Psychiatry, College of Medicine, Chung-Ang University, Seoul, Korea
6. Department of Psychiatry, Keyo Hospital, Uiwang, Korea
7. Department of Psychiatry, Haeundae Paik Hospital, College of Medicine, Inje University, Busan, Korea
8. Department of Psychiatry, Naju National Hospital, Naju, Korea