1. Department of Psychiatry, The Catholic University of Korea College of Medicine, Seoul, Korea
2. Department of Neuropsychiatry, College of Medicine, Hallym University, Seoul, Korea
3. Department of Psychiatry, Yonsei University College of Medicine, Seoul, Korea
4. Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
5. Department of Psychiatry, Kyunghee University College of Medicine, Seoul, Korea
6. Department of Psychiatry, College of Medicine, Inje University, Seoul, Korea
7. Department of Neuropsychiatry, School of Medicine, Dongguk University, Gyeongju, Korea
8. Department of Psychiatry, College of Medicine, Korea University, Seoul, Korea