1. Department of Psychiatry, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
2. Jeju Mental Sanatorium, Jeju, Korea.
3. Department of Medical Humanities and Social Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
4. Department of Pediatrics, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.