1 Division of Digestive Surgery, University Hospitals of Geneva, Geneva, Switzerland; Medical School, University of Geneva, Geneva, Switzerland. Electronic address: jeremy.meyer@hcuge.ch.
2 Department of General Surgery, Ospedale di Circolo Fondazione Macchi, University of Insubria, Varese, Italy.
3 Division of Digestive Surgery, University Hospitals of Geneva, Geneva, Switzerland; Medical School, University of Geneva, Geneva, Switzerland.
4 Cambridge Colorectal Unit, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK.