1. From the Department of Radiology, Kyungpook National University Medical Center, 807 Hoguk-ro, Buk-gu, Daegu 41404, Republic of Korea (H.C., H.J.K., G.C.K., W.H.K.); Department of Radiology, Kyungpook National University Hospital, Daegu, Korea (T.H.K., H.K.R., J.L.); and Department of Obstetrics and Gynecology, College of Medicine, Gyeongsang National University, Gyeongsang National University Changwon Hospital, Changwon, Korea (J.S.Y.).