1. From the Departments of Radiology (J.S.B., J.M.L., J.H.Y., H.J.K., S.K.J., I.J.) and Pathology (K.B.L., H.K.), Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea; Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea (J.S.B., J.M.L., J.H.Y., H.J.K., S.K.J., I.J.); and Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea (J.M.L.).