1. Department of Psychiatry, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.
2. Department of Psychiatry, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea.
3. Department of Psychiatry, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea.
4. Department of Psychiatry, Hanyang University Guri Hospital, Hanyang University Medical School, Guri, Korea.
5. Department of Psychiatry, Graduated School, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Psychiatry, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Department of Psychiatry, Keyo Hospital, Uiwang, Korea.