1. Department of Psychiatry, Chuncheon National Hospital, Chuncheon, Korea.
2. Department of Psychiatry, Yong-In Mental Hospital, Yongin, Korea.
3. Department of Psychiatry, Hanyang University Guri Hospital, Guri, Korea.
4. Department of Psychiatry, Kangwon National University School of Medicine, Chuncheon, Korea.
5. Department of Psychiatry, Hanyang University College of Medicine, Seoul, Korea.
6. nstitute of Mental Health, Hanyang University, Seoul, Korea.