[1] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Emergency Dept & Med, Via Sforza 35, Milan, Italy
[2] Fdn IRCCS Policlin San Matteo, Gastroenterol & Digest Endoscopy Unit, Viale Camillo Golgi 19, Pavia, Italy
[3] Univ Milan, Scuola Specializzaz Med Emergenza Urgenza, Milan, Italy
[4] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Emergency Surg Unit, Via F Sforza 35, Milan, Italy
[5] Univ Pavia, Dept Internal Med & Med Therapeut, Pavia, Italy
[6] Fdn IRCCS Policlin San Matteo, Dept Internal Med 1, Pavia, Italy