Affiliation: | a From the Department of Diagnostic Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea b Department of Internal Medicine,Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea c Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea d Department of Statistics, Sungshin Womeris University, Seoul, Korea |