1. Clinic for Gastroenterology, Hepatology and InfectiologyHeinrich Heine University Düsseldorf Germany
2. Department of PhysiologyHeinrich Heine University Düsseldorf Germany
3. Central Institute for Clinical Chemistry and Laboratory MedicineHeinrich Heine University Düsseldorf Germany
4. Department of Biochemistry and Molecular Biology IHeinrich Heine University Düsseldorf Germany
5. Department of Medical MicrobiologyHeinrich Heine University Düsseldorf Germany
6. Karolinska University Hospital Huddinge Stockholm Sweden
7. Centre for Molecular Biology and NeuroscienceUniversity of Oslo Norway
8. Department of PathologyUniversity of Cologne Germany