1 Department of General Surgery, Fondazione Poliambulanza-Istituto Ospedaliero, Via Leonida Bissolati, 57, 25124, Brescia, BS, Italy. elio.treppiedi@gmail.com.
2 Upper G.I. Surgery Division, Department of General Surgery, University of Verona, 37126, Verona, Italy.
3 Digestive Surgery, European Institute of Oncology, IRCCS, Milan, Italy.