1 Coloproctology Surgery Unit, General Surgery Department, University Clinical Hospital of Valencia, University of Valencia, Avda. Blasco Ibáñez Nº17, 46010, Valencia, Spain. lety_stn@hotmail.com.
2 Coloproctology Surgery Unit, General Surgery Department, University Clinical Hospital of Valencia, University of Valencia, Avda. Blasco Ibáñez Nº17, 46010, Valencia, Spain.