1. Department of Surgical Sciences and Integrated Diagnostics (DISC), Policlinico San Martino, University General Hospital, University of Genoa, Genoa, Italy
2. Department of Medical Oncology, Azienda Sanitaria Universitaria Integrata di Trieste, Ospedale Maggiore, Trieste, Italy
3. Colorectal Surgery and General Surgery, Ospedale per gli Infermi, Faenza, Italy
4. Department of Surgery, Institute of Clinical Sciences, Sahlgrenska University Hospital, Göteborg, Sweden