1 Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium.
2 Division of Gastroenterology, Rabin Medical Center, Beilinson Hospital, Petach Tikwa, Israel and Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
3 University of Medicine and Pharmacy Gr T Popa Iasi and University Hospital St Spiridon, Iasi, Romania.
4 Department of Gastroenterology and Hepatology, Wroclaw Medical University, Wroclaw, Poland.
5 Digestive System Research Unit. University Hospital Vall d'Hebron. Centro de Investigación Biomédica en Red de enfermedades hepáticas y digestivas (CIBERehd). Barcelona, Spain.
6 Department of Internal Medicine VI: Psychosomatic Medicine and Psychotherapy, University Hospital Tübingen, Tübingen, Germany.