| Affiliation: | 1. Department of Radiology, Seoul St Mary's Hospital, School of Medicine, Catholic University of Korea, Seoul, Korea;2. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Seoul, Korea;3. Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan-si, Korea;4. National Cancer Control Institute, National Cancer Center, Goyang-si, Korea;5. Department of Social Medicine, College of Medicine, Dankook University, Cheonan-si, Korea;6. Department of Preventive Medicine and Institute of Health Services Research, Yonsei University College of Medicine, Seoul, Korea |
