Affiliation: | 1. Department of Radiology and Research Institute of Radiological Science, Severance Hospital, University of Yonsei, College of Medicine, Seoul, Republic of Korea;3. Department of Radiology, Gangnam Severance Hospital, University of Yonsei, College of Medicine, Seoul, Republic of Korea;2. Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea |