1. Department of Medical and Surgical Science University of Catanzaro Catanzaro Italy
2. Minerva Surgical Service Catanzaro Italy
3. Department of Surgical Sciences Sapienza University of Rome Rome Italy
4. Department of Emergency and Organ transplantation and Inter‐Department Research Centre for Pelvic Floor Disease (CIRPAP) University Aldo Moro of Bari Bari Italy
5. Proctology Unit, Department of Biotechnological and Applied Clinical Sciences University of L'Aquila L'Aquila Italy
6. Biostat Research S.A.S Borgomanero Italy
7. Proctology and Pelvic Floor Clinical Centre Cisanello University Hospital Pisa Italy
8. Chirurgia 1, Azienda ULSS 2 Marca Trevigiana Ospedale Regionale Treviso Treviso Italy
9. Surgical Unit "M. Rubino" Department of Emergency and Organ Transplantation University Aldo Moro of Bari Bari Italy
10. Department of General Surgery Infermi Hospital, Rivoli Torino Italy
11. Department of General Surgery "Degli Infermi" Hospital Biella Italy
12. Department of Surgery Aosta Hospital Aosta Italy
13. General Surgery Unit Cetraro Hospital Cetraro Italy
14. Department of Colorectal Surgery S. Rita Clinic Vercelli Italy
15. General Surgery Unit, San Salvatore Hospital, Department of Biotechnological and Applied Clinical Sciences University of L'Aquila L'Aquila Italy