Affiliation: | Current affiliations: Division of Gastroenterology and Hepatology (E.V.L., T.H.B., C.J.G., B.T.P., W.J.T., W.A.F., K.W.S., D.S.P., K.A.H., D.A.J., W.J.S.), Department of Radiology (J.G.F., J.M.B., J.L.F., J.E.H., C.D.J.), and Division of Biostatistics (W.S.H, A.R.Z.), Mayo Clinic College of Medicine, Rochester, Minnesota, Park-Nicollet Clinic (C.A.S.), Saint Louis Park, Minnesota, USA, Clinical Pharmacology Unit (L.J.E.), University College Hospital, Galway, Ireland, Department of Radiology (C.D.J.), Mayo Clinic, Scottsdale, Arizona, USA |