1 Department of Pathology, Hospital Graz II, Academic Teaching Hospital of the Medical University Graz, Graz, Austria. sigurd.lax@kages.at.
2 School of Medicine, Johannes Kepler University Linz, Linz, Austria. sigurd.lax@kages.at.
3 Department of Pathology, Hospital Graz II, Academic Teaching Hospital of the Medical University Graz, Graz, Austria.
4 Division of Gastroenterology and Hepatology with Intensive Care 13H1, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria.