1 Department of Gastroenterology, Università Politecnica delle Marche, Ancona, Italy; ; Department of Gastroenterology and Hepatology, Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands;
2 Department of Gastroenterology, Università Politecnica delle Marche, Ancona, Italy; ; Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria.
3 Department of Gastroenterology, Università Politecnica delle Marche, Ancona, Italy;