1. Department of Psychiatry, College of Medicine, Dankook University, Chungcheongnam-do, Korea
2. Department of Neuropsychiatry, Seoul National University Bundang Hospital, Gyeonggi-do, Korea
3. Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea
4. Department of Psychiatry, Korean Armed Forces Capital Hospital, Gyeonggi-do, Korea