1 Department of Digestive Surgery, University Hospital, CHU Clermont-Ferrand, Place Lucie Aubrac, 63003 Clermont-Ferrand, France; Francophone Group for Enhanced Recovery After Surgery (GRACE), 63110 Beaumont, France. Electronic address: kslim@chu-clermontferrand.fr.
2 Department of Digestive Surgery, University Hospital, CHU Clermont-Ferrand, Place Lucie Aubrac, 63003 Clermont-Ferrand, France; Francophone Group for Enhanced Recovery After Surgery (GRACE), 63110 Beaumont, France.
3 Department of Anaesthesia, Princess Grace Hospital, Avenue Pasteur, Monaco.