Westphalen Antonio C, Coakley Fergus V, Joe Bonnie N
Department of Radiology and Biomedical Imaging, Abdominal Imaging Division, University of California, San Francisco, 505 Parnassus Ave., Box 0628, M-372, San Francisco, CA 94143-0628, USA.
AJR Am J Roentgenol. 2010 Jun;194(6 Suppl):S46-50. doi: 10.2214/AJR.07.7058.