1. Colorectal Surgery Unit, Vall d’Hebron University Hospital, Universitat Autònoma de Barcelona , Barcelona , Spain
2. Department of Advanced Medical and Surgical Sciences, Università degli Studi della Campania Luigi Vanvitelli , Naples , Italy
3. Coloproctology Unit, Hospital Universitario Son Espases, Palma de Mallorca , Spain
4. Health Research Institute of the Balearic Islands, Palma de Mallorca , Spain
5. 3D Reconstruction Unit and Simulation Center. Hospital Universitario Son Espases, Palma de Mallorca , Spain
6. Human Embryology and Anatomy Department, University of the Balearic Islands, Palma de Mallorca , Spain