1. Colorectal Unit, IDIBELL, Bellvitge University Hospital, Department of General and Digestive Surgery, University of Barcelona, Barcelona, Spain
2. Colorectal Unit, Vall d'Hebron University Hospital, Department of General and Digestive Surgery, Autonomic University of Barcelona, Barcelona, Spain
3. General and Colorectal Surgery Unit, S. Leonardo Hospital/ASL-Na3-sud, Castellammare di Stabia, Naples, Italy
4. General Surgery Unit, S. Giuliano Hospital, Giugliano, Naples, Italy
5. Colorectal Cancer Surgery Unit, Istituto Nazionale Tumori di Napoli, Istituto di Ricovero e Cura a Carattere Scientifico, Naples, Italy