1. Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Korea.
2. Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Psychiatry, Asan Medical Center, Seoul, Korea.
4. Department of Psychiatry, Seoul Metropolitan Eunpyeong Hospital, Seoul, Korea.
5. Department of Psychiatry, Inha University Hospital, Incheon, Korea.
6. Department of Psychiatry and Behavioral Science, National Cancer Center, Goyang, Korea.
7. Division of Cancer Control & Policy, National Cancer Center, Goyang, Korea.
8. Institute of Human Behavioral Medicine, Seoul National University Medical Research Center, Seoul, Korea.