1. Department of Psychiatry, Wonkwang University Hospital, School of Medicine, Wonkwang University, Iksan 54538, Republic of Korea
2. Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
3. Department of Psychiatry, College of Medicine, Chung-Ang University, Seoul 06974, Republic of Korea
4. Department of Psychiatry, Ilsan Paik Hospital, Inje University College of Medicine, Goyang 10380, Republic of Korea
5. Department of Psychiatry, Sanggye Paik Hospital, Inje University College of Medicine, Seoul 01757, Republic of Korea
6. Department of Psychiatry, Soonchunhyang University Cheonan Hospital, College of Medicine, Soonchunhyang University, Cheonan 31151, Republic of Korea
7. Department of Psychiatry, Haeundae Paik Hospital, College of Medicine, Inje University, Busan 48108, Republic of Korea
8. Department of Psychiatry, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea