1. From the Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea (M.K.K.); Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea (J.M.C.); and Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea (J.M.C.).