[1] Univ Milan, IRRCS Fdn Policlin, Dipartimento Sci Med, I-20122 Milan, Italy
[2] Osped S Carlo Borromeo, UO Gastroenterol, Milan, Italy
[3] Fdn IRCCS Ist Nazl Tumori, SC Endoscopia Diagnost & Chirurg Endoscop, Milan, Italy
[4] Osped S Raffaele Resnati, UO Endoscopia Digest, Milan, Italy
[5] Osped L Sacco, UO Gastroenterol, Milan, Italy
[6] Univ Milan, IRCCS Azienda Osped S Paolo, UO Endoscopia Digest, I-20122 Milan, Italy
[7] Casa Cura S Pio X, UO Endoscopia Digest, Milan, Italy
[8] Osped S Carlo Borromeo, UO Epidemiol & Stat Med, Milan, Italy
[9] Ente Osped C Cantu Abbiategrasso MI, UO Med, Abbiategrasso, Italy
[10] Azienda Osped Salvini PO Rho, UO Gastroenterol, Rho, Italy
[11] Clin S Carlo, UO Endoscopia Digest, Paterno Dugnano, Italy
[12] Azienda Osped S Gerardo, UO Endoscopia Digest, Monza, Italy
[13] Osped Civile Vimercate, UO Med Interna, Vimercate, Italy
[14] Presidio Osped Osped Melegnano, UO Endoscopia Digest, Melegnano, Italy
[15] AO Osped Circolo Busto Arsizio, UO Med Interna, Busto Arsizio, Italy
[16] Azienda Osped S Antonio Abate, UO Gastroenterol, Varese, Italy
[17] Azienda Osped Fdn Macchi Osp, UO Gastroenterol, Varese, Italy
[18] AO Ist Ospitalieri Cremona, UO Gastroenterol, Cremona, Italy
[19] IRCCS Policlin S Matteo, UO Gastroenterol, Pavia, Italy
[20] Congregaz Ancelle Carita, Serv Endoscopia Digest, Brescia, Italy
[21] Osped Desenzano Garda, UO Med, Desenzano Del Garda, Italy
[22] Osped Valduce, UO Gastroenterol, Como, Italy
[23] Azienda Osped Carlo Poma, UO Endoscopia Digest, Mantua, Italy
[24] Azienda Osped Eugenio Morelli Sondalo, UO Endoscopia Digest, Sondalo, Italy
[25] Univ Milan, IRCCS Fdn Policlin, Dipartimento Sci Med, I-20122 Milan, Italy