[1] Bradford Royal Infirmary,Department of General Surgery
[2] Elizabeth University Hospital,Department of General Surgery
[3] Blizard Institute of Cell and Molecular Science: Barts and The London School of Medicine and Dentistry Blizard Institute,The University of Edinburgh Usher Institute of Population Health Sciences and Informatics
[4] University of Edinburgh,Department of General Surgery
[5] Addenbrooke’s Hospital,Department of General Surgery
[6] Royal Infirmary Edinburgh,Department of General Surgery
[7] University Hospital Wales,Department of General Surgery
[8] The Whittington Hospital NHS Trust,Department of General Surgery
[9] Sunderland Royal Hospital,Department of General Surgery
[10] Royal Alexandra Hospital,Department of Clinical and Experimental Sciences
[11] University of Brescia,Department of Emergency and Trauma Surgery
[12] University of Parma,Department of General Surgery
[13] Derby City General Hospital,Department of General Surgery
[14] Forth Valley Royal Hospital,undefined