1. Department of Psychiatry, Yong-In Mental Hospital, Yongin, Korea.
2. Institute of Mental Health, Hanyang University, Seoul, Korea.
3. Seoul Mental Health Center & Seoul Suicide Prevention Center, Seoul, Korea.
4. Department of Psychiatry, Gachon University, School of Medicine, Incheon, Korea.
5. Department of Psychiatry, Inje University Ilsan Paik Hospital, Goyang, Korea.