S Biondo1, L Trenti2, B Miguel2, E Kreisler2. 1. Colorectal Unit, Department of General and Digestive Surgery, Bellvitge University Hospital, University of Barcelona and IDIBELL (Bellvitge Biomedical Investigation Institute), C/Feixa Llarga s/n, L'Hospitalet de Llobregat, 08907, Barcelona, Spain. sbn.biondo@gmail.com. 2. Colorectal Unit, Department of General and Digestive Surgery, Bellvitge University Hospital, University of Barcelona and IDIBELL (Bellvitge Biomedical Investigation Institute), C/Feixa Llarga s/n, L'Hospitalet de Llobregat, 08907, Barcelona, Spain.