1. Department of Psychiatry, Inje University Haeundae Paik Hospital, Busan, Korea.
2. Department of Psychiatry, Dongguk University College of Medicine, Gyeongju, Korea.
3. Department of Psychiatry, Yeungnam University School of Medicine, Daegu, Korea.
4. Department of Psychiatry, Chonnam National University School of Medicine, Gwangju, Korea.
5. Department of Psychiatry, The Catholic University of Korea College of Medicine, Seoul, Korea.
6. Department of Psychiatry, Korea University College of Medicine, Seoul, Korea.
7. Department of Psychiatry, Keimyung University School of Medicine, Daegu, Korea.
8. Department of Preventive Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
9. Department of Psychiatry, Hanyang University Guri Hospital, Guri, Korea.