1. From the Department of Radiology, Inha University School of Medicine, Incheon, Republic of Korea (G.R.K.); and Departments of Radiology (J.S.C., B.K.H., E.Y.K., E.S.K.) and Surgery (J.E.L., S.J.N., S.K.L.), Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seou 137-710, Republic of Korea.