1. Institute of Pathology, Medical University of Graz, 8036 Graz, Austria.
2. Institute of Molecular Biosciences, University of Graz, 8010 Graz, Austria.
3. Institute of Medical Engineering, Graz University of Technology, 8010 Graz, Austria.
4. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, 8036 Graz, Austria.