1. Department of Psychiatry, Yong-In Mental Hospital, Yongin, Korea
2. Institute of Mental Health, Hanyang University, Seoul, Korea
3. Department of Psychiatry, Hanyang University Guri Hospital, Guri, Korea
4. Department of Psychiatry, Kangwon University School of Medicine, Chuncheon, Korea
5. Department of Psychiatry, Inje University Haeundae Paik Hospital, Busan, Korea
6. Department of Psychiatry, Soonchunhyang University Cheonan Hospital, Cheonan, Korea