Affiliation: | (1) Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Pungnap 2-dong, Songpa-gu, Seoul, 138-736, Korea;(2) Department of Radiology, Eulgi Medical Center, 280-1, Hagye-dong, Nowon-gu, Seoul, 139-711, Korea;(3) Department of Medical Imaging, Toronto General Hospital, 200 Elizabeth St, Toronto, Ontario, Canada, M5G2C4;(4) Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Pungnap 2-dong, Songpa-gu, Seoul, 138-736, Korea;(5) Department of Radiology, Yong Dong Severance Hospital, 146-92 Dokok-dong, Kangnam-ku, Seoul, 137-270, Korea |