1. From the Departments of Radiology (G.S.J., J.H.Y., J.G.P.) and Internal Medicine (B.C.Y., B.H.H., S.U.L.), Kosin University College of Medicine, 34 Amnam-dong, Seo-gu, Busan 602-702, South Korea; and Department of Radiology, Andong General Hospital, Gyeongsangbuk-do, South Korea (Y.J.K., Y.H.K.).