1. Department of Digestive Surgery University Hospital of Angers Angers Cedex 9 France
2. CHU Angers University of Angers Angers France
3. CHU Angers HIFIH, SFR ICAT University of Angers Angers France
4. TIMC‐IMAG Laboratory, National Centre for Scientific Research, Grenoble National Polytechnical Institute, Grenoble Alps University Hospital Grenoble Alps University Grenoble France
5. Colorectal Surgery Unit, Visceral surgery and Acute Care surgery Department Grenoble Alps University Hospital Grenoble France
6. Institut Léopold Bellan, Groupe Hospitalier Paris Saint‐Joseph Service de Proctologie Médico‐Chirurgicale Paris France
7. Unité D'explorations Fonctionnelles Digestives CHU Rennes Pontchaillou Rennes France
8. Unité de Proctologie, Service des Maladies de l'appareil digestif CHU Rennes Pontchaillou Rennes France
9. Department of Digestive Surgery University Hospital of Nantes Nantes France
10. Department of Digestive Surgery University Hospital of Caen Caen Cedex France
11. UMR INSERM U1086 Anticipe Centre François Baclesse Caen Cedex France
12. Department of Digestive Surgery, Hôpital Lyon Sud CHU Lyon Cedex France
13. Faculty of Medicine of Lyon Sud‐Charles Mérieux University Lyon 1 Cedex France
14. Department of Digestive, Oncological, Endocrine, Hepato‐Biliary Pancreatic and Liver Transplant Surgery Trousseau Hospital Chambray les Tours France
15. Department of Digestive Surgery Rouen University Hospital Rouen France
16. Department of Digestive Surgery CHU Rennes Pontchaillou Rennes France
17. Department of Gynecology and Obstetrics University Hospital of Angers Angers Cedex 9 France
18. Department of Digestive Surgery Dijon University Hospital Dijon France
19. Department of Biostatistics. La Maison de la Recherche University Hospital of Angers Angers Cedex 9 France