1. Department of Psychiatry, Kyungpook National University Hospital, Daegu, Korea.
2. Department of Psychiatry, School of Medicine, Kyungpook National University, Daegu, Korea.
3. Department of Psychiatry, School of Medicine, Sungkyunkwan University, Seoul, Korea.
4. Department of Psychiatry, Inje University College of Medicine, Seoul, Korea.
5. Department of Psychiatry and Behavioral Sciences, Seoul National University College of Medicine, Seoul, Korea.
6. Department of Psychiatry, Gachon Medical School, Incheon, Korea.
7. Department of Psychiatry, Kangwon National University School of Medicine, Chuncheon, Korea.
8. Department of Psychiatry, Kangdong Sacred Heart Hospital, Seoul, Korea.
9. Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea.