1. Department of Endocrinology and Metabolism, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Bucheon, Korea.
2. Department of Psychiatry, Chung-ju Hospital, College of Medicine, Konkuk University, Seoul, Korea.
3. Department of Psychiatry, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Department of Health Administration, Namseoul University, Seoul, Korea.
5. Clinical Medicine Research Institute, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Bucheon, Korea.
6. Department of Psychiatry, Keyo Hospital, Keyo Medical Foundation, Uiwang, Korea.
7. Department of Social Welfare with Addiction Rehablitation, Eulji University, Seoul, Korea.