Affiliation: | Current affiliations: Gastrointestinal Unit (C.K., S.C., B.G.T., W.B.), Surgery Department (Y.K.), Radiology Department (A.K., D.V.S.), Pathology Department (M.M.-K.), Massachusetts General Hospital, Boston, Massachusetts, USA; Biocompatibles International plc (C.M.), Farnham, Surrey, United Kingdom |