1 Department of Surgery and Interventional Sciences, University College London Hospitals, National Health Service Foundation Trusts, GENIE Centre, University College London, London, United Kingdom.
2 Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland.
3 Unit of General and Geriatric Surgery, Universitá della Campania "Luigi Vanvitelli," Naples, Italy.
4 Division of Colorectal Surgery, University of Southern California Keck School of Medicine, Los Angeles, California.
5 Royal Devon and Exeter National Health Service Foundation Trust, Exeter, United Kingdom.
6 Newcastle Centre for Bowel Disease, Department of Colorectal Surgery, Newcastle upon Tyne Hospitals, National Health Service Foundation Trust, Newcastle upon Tyne, United Kingdom.