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