1. Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Psychiatry, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Department of Social Welfare (BK21 FOUR), Jeonbuk National University, Jeonju, Korea.
4. Department of Counseling, Baekseok University, Cheonan, Korea.
5. Department of Psychiatry, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea.