Affiliation: | 1 Hepatogastroenterology Unit, Second Department of Internal Medicine and Research Institute, Attikon University General Hospital, Medical School, Athens University, Athens, Greece;2 Second Department of Gastroenterology, Evangelismos General Hospital, Athens, Greece;3 Gastroenterology Department, NIMTS Hospital, Athens, Greece;4 Academic Department of Gastroenterology, Laiko General Hospital, Medical School, Athens University, Athens, Greece |