L D'Amore1, L Bambi2, P Negro2, F Gossetti2. 1. Abdominal Wall Unit, Department of Surgery "P.Stefanini", Sapienza University of Rome, Rome, Italy. linda.damore@uniroma1.it. 2. Abdominal Wall Unit, Department of Surgery "P.Stefanini", Sapienza University of Rome, Rome, Italy.