1. Department of Psychiatry, Nowon Eulji University Hospital, Eulji University School of Medicine, Seoul, Korea
2. Department of Psychiatry, Kyung Hee University School of Medicine, Seoul, Korea
3. Leemind Psychiatric Clinic, Seoul, Korea
4. Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
5. Department of Psychiatry, Inje University College of Medicine, Seoul, Korea
6. Department of Psychiatry, College of Medicine, Ewha Womans University, Seoul, Korea
7. Department of Psychiatry, Soonchunhyang University College of Medicine, Bucheon, Korea
8. Department of Psychiatry, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
9. Department of Psychiatry, Chung-Ang University College of Medicine, Seoul, Korea
10. Department of Clinical Psychiatry, Seoul Brain Research Institute, Seoul, Korea
11. Nowon Community Addiction Management Center, Seoul, Korea
12. Eulji Psychiatry and Medical Science Center, Seoul, Korea