1. Department of Neuropsychiatry, Bongseng Memorial Hospital, Busan, Korea.
2. Department of Psychiatry, SeoDaegu Daedong Hospital, Daegu, Korea.
3. Department of Psychiatry, School of Medicine, the Catholic University, Seoul, Korea.
4. Department of Psychiatry, School of Medicine, Korea University, Seoul, Korea.
5. Department of Psychiatry, School of Medicine, Chonnam National University, Gwangju, Korea.
6. Department of Preventive Medicine, School of Medicine, the Catholic University, Seoul, Korea.
7. Department of Psychiatry, Keimyung University School of Medicine, Daegu, Korea.