1. Coloproctology Unit, General and Digestive Surgery Department Parc Tauli University Hospital, Institut d'investigació i innovació Parc Tauli I3PT, Universitat Autònoma de Barcelona Sabadell Spain
2. Urology Department Parc Tauli University Hospital Sabadell Spain
3. Coloproctology Unit, General and Digestive Surgery Department Vic University Hospital Barcelona Spain
4. Coloproctology Unit, General and Digestive Surgery Department La Fe University Hospital Valencia Spain
5. Coloproctology Unit, General and Digestive Surgery Department Joan XXIII University Hospital Tarragona Spain
6. Coloproctology Unit, General and Digestive Surgery Department Mutua de Terrassa University Hospital Terrassa Spain
7. Coloproctology Unit, Coloproctología, Cirugía General y del Ap. Digestivo ALTHAIA, Xarxa Assistencial Universitària de Manresa – Sant Joan de Déu Hospital Manresa Spain