1. Division of Gastroenterology and Hepatology Department of Internal Medicine III Medical University of Vienna Vienna Austria
2. Department of Internal Medicine IV University Hospital Heidelberg Heidelberg Germany
3. Division of Gastroenterology and Hepatology Department of Internal Medicine Medical University of Graz Graz Austria
4. Department of Pathology Medical University of Vienna Vienna Austria
5. Institute of Pathology University Hospital Heidelberg Heidelberg Germany
6. Institute of Pathology Medical University of Graz Graz Austria
7. Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases Vienna Austria
8. CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences Vienna Austria