1. Department of Health Policy and Management, Seoul National University College of Medicine, Seoul, Korea.
2. Institute of Health Policy and Management, SNUMRC, Seoul, Korea.
3. Department of Neuropsychiatry, Kangwon National University School of Medicine, Chuncheon, Korea.
4. Seoul Mental Health Center, Seoul, Korea.
5. Department of Psychiatry, Incheon Medical Center, Incheon, Korea.