1. Department of Psychiatry, Seoul National University Hospital, Seoul, Korea.
2. Department of Psychiatry, School of Medicine, Chungnam National University, Daejeon, Korea.
3. Department of Psychiatry, School of Medicine, Dankook University, Cheonan, Korea.
4. Department of Psychiatry, Seoul Medical Center, Seoul, Korea.
5. Department of Psychiatry, National Medical Center, Seoul, Korea.
6. Department of Infectious Disease, National Medical Center, Seoul, Korea.