1. Department of Psychiatry, Inha University Hospital, Incheon, Republic of Korea.
2. Department of Psychiatry, Gyeonggi Provincial Medical Center Suwon Hospital, Suwon, Republic of Korea.
3. Department of Psychiatry, Settlement Support Center for North Korean Refugees, Anseong, Republic of Korea.
4. Graduate School of Public Health Seoul National University, Seoul, Republic of Korea.