1. Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
2. Department of Psychiatry, Depression Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
3. Department of Psychology, Chungbuk National University, Chungju, South Korea
4. Department of Psychology, Seoul National University, Seoul, South Korea
5. Department of Education, Chinju National University of Education, Chinju, South Korea