1. Department of Surgical Sciences; Azienda Ospedaliero - Universitaria di Parma; Parma Italy
2. Department of Medical, Surgical, Neurological, Metabolic and Ageing Sciences; Universtià della Campania ‘Luigi Vanvitelli’; Naples Italy
3. Department of Colorectal Surgery; Royal Marsden Hospital; London UK
4. Department of Surgery and Cancer; Imperial College London; London UK
5. Department of Colorectal Surgery; Chelsea and Westminster Hospital; London UK