1. Department of Gastroenterology, Lithuanian University of Health Sciences, Kaunas, Lithuania
2. Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
3. Department of Internal Medicine, Division of Gastroenterology, Hepatology, and Nutrition, Virginia Commonwealth University and Central Virginia Veterans Healthcare System, Richmond, Virginia, USA
4. Department of Radiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
5. Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
6. Ist Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
7. Martin Zeitz Center for Rare Diseases, University Medical Center Hamburg-Eppendorf, Hamburg, Germany