1. Department of Child and Adolescent Psychiatry, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Psychiatry, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
3. Department of Psychiatry, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Department of Psychiatry, Ulsan University Hospital, Ulsan, Korea.
5. Department of Psychiatry, Gachon University of Medicine and Science, Incheon, Korea.