1. Department of Surgery, “Sapienza” University of Rome, 00161 Rome, Italy
2. Department of Public Health and Infectious Diseases, “Sapienza” University of Rome, 00161 Rome, Italy
3. United Hospitals of Northern Marche (AOORMN)—Pesaro, 61121 Pesaro, Italy
4. Unit of Academic General Surgery “V. Bonomo”, University of Bari, 70124 Bari, Italy
5. Department of Surgery, Santa Croce e Carle Hospital (ASO) of Cuneo, 12100 Cuneo, Italy
6. Department of Surgery, S. Maria Della Misericordia Hospital, ASUFC of Udine, 33100 Udine, Italy
7. Department of Surgery, Versilia Hospital of Viareggio, 55049 Camaiore, Italy
8. Day Surgery P.O.S. Giovanni Bosco, 80144 Naples, Italy
9. Department of Surgery, Alta Val D’Elsa Hospital of Poggibonsi—Siena, 53036 Poggibonsi, Italy