1 Gastroenterology and Endoscopy Unit, University Hospital of Parma, University of Parma, Viale Gramsci 14, 43126, Parma, Italy.
2 Gastroenterology and Endoscopy Unit, University Hospital of Parma, University of Parma, Viale Gramsci 14, 43126, Parma, Italy. pcortegosovaldivia@ao.pr.it.