1. Department of RadiologySeoul National University College of Medicine, and Institute of Radiation Medicine, Seoul National University Medical Research Center Seoul South Korea
2. Cancer Research InstituteSeoul National University Seoul South Korea
3. Department of RadiologySeoul National University Bundang Hospital Seongnam South Korea
4. Department of RadiologySeoul Metropolitan Government–Seoul National University Boramae Medical Center Seoul South Korea
5. Department of RadiologySeverance Hospital, Yonsei University College of Medicine Seoul South Korea