1. Department of Internal Medicine; Division of Gastroenterology and Hepatology; University Hospital Zurich; Switzerland
2. Department of Clinical Chemistry and Laboratory Medicine; University Hospital Regensburg; Germany
3. Institute of Anatomy I; Ludwig-Maximilians-Universität; Munich Germany
4. Laboratory of Cell Differentiation; Masaryk University; Czech Republic
5. Institute of Food Chemistry; University Munster; Germany