Dimitris Dimitroulopoulos, Eleftheria Petroulaki, Spilios Manolakopoulos, Olga Anagnostou, Domna Tsaklakidou, Dimitris Xinopoulos, Klisthenis Tsamakidis, Dimitris Tzourmakliotis, Emmanouil Paraskevas106th Annual Meeting of the American Gastroenterological Association,Chicago USA,May 2005