1. Department of Surgery, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
2. Maggiore Hospital Regional Emergency Surgery and Trauma Centre, Bologna Local Health District, Bologna, Italy
3. General, Emergency and Robotic Surgery Unit, San Francesco Hospital, Nuoro, Italy
4. Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Catanzaro, Italy
5. Department of Surgery, University of Catania, Catania, Italy