1. Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
2. Department of Psychiatry, Bugok National Hospital, Changnyeong, Korea.
3. Department of Psychiatry, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
4. Department of Psychiatry, Incheon Chamsarang Hospital, Incheon, Korea.
5. Department of Psychiatry, National Forensic Hospital, Gongju, Korea.
6. Department of Psychiatry, Daedong Hospital, Daegu, Korea.