Affiliation: | (1) Department of General Surgery, The Royal Oldham Hospital, Rochdale Road, Oldham, OL1 2JH, UK;(2) Department of Hepato-Pancreato-Biliary Surgery, North Manchester General Hospital, Delaunays Road, Crumpsall, Manchester, M8 5RB, UK;(3) The University of Manchester, Oxford Road, Manchester, UK; |