Patient willingness for repeat screening and preference for CT colonography and optical colonoscopy in ACRIN 6664: the National CT Colonography trial by Gareen IF, Siewert B, Vanness DJ, Herman B, Johnson CD, Gatsonis C

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Qualitative mapping of cerebral blood flow and functional localization with echo-planar MR imaging and signal targeting with alternating radio frequency. by Edelman, R, Siewert, B, Darby, D, Thangaraj, V, Nobre, A, Mesulam, M, Warach, S