[1] Univ Copenhagen, Herlev Hosp, Div Endoscopy, Gastro Unit, Herlev, Denmark
[2] Univ Med & Pharm Craiova, Res Ctr Gastroenterol & Hepatol, Craiova, Romania
[3] UT MD Anderson Canc Ctr, Dept Gastroenterol Hepatol & Nutr, Unit 1466, Houston, TX USA
[4] Nuovo Osped S Agostino, Endoscopia Digest, Modena, Italy
[5] Univ Med & Pharm Craiova, Dept Pathol, Craiova, Romania