[1] Univ Milan, Dept Pathophysiol & Transplantat, Via Francesco Sforza 35, I-20122 Milan, Italy
[2] Univ Hosp Ghent, Dept Gastroenterol & Hepatol, Ghent, Belgium
[3] Univ Politecn Marche, Clin Gastroenterol Hepatol & Emergency Digest Endo, Ancona, Italy
[4] Univ Hosp Brussels UZ Brussels, Dept Gastroenterol & Hepatol, Brussels, Belgium
[5] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Gastroenterol & Endoscopy Unit, Milan, Italy