1. Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, South Korea
2. Department of Psychiatry, Dankook University Hospital, Cheonan, South Korea
3. Department of Psychiatry, College of Medicine, Dankook University, Cheonan, South Korea
4. Chungcheongnam-do Mental Health Welfare Center, Hongseong, South Korea
5. Korea Human Resource Development Institute for Health & Welfare, Seoul, South Korea
6. Department of Public Health and Healthcare Management, Graduate School, The Catholic University of Korea, Seoul, South Korea