1. Department of Medicine, Graduate School, Kyung Hee University, Seoul, Korea
2. Department of Psychiatry, Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
3. Department of Psychiatry, Kyung Hee University Hospital, Seoul, Korea
4. Department of Psychiatry, Seonam University College of Medicine, Myongji Hospital, Goyang, Korea
5. Department of Psychiatry, Konyang Univerisity College of Medicine, Konyang University Hospital, Daejeon, Korea
6. Department of Psychiatry, Silverheals Hospital, Namyangju, Korea
7. Department of Psychiatry, Kyung Hee University School of Medicine, Seoul, Korea