1 Division of General Surgery, Department of Surgical Sciences, Catholic University of the Sacred Heart -School of Medicine, Largo F Vito 1, 00168 Rome, Italy. Electronic address: andrea.digorgio@rm.unicatt.it.
2 Division of General Surgery, Department of Surgical Sciences, Catholic University of the Sacred Heart -School of Medicine, Largo F Vito 1, 00168 Rome, Italy.