1. Division of Paediatric Gastroenterology and Hepatology, Department of Paediatric Liver, Kidney and Metabolic Diseases Hannover Medical School Hannover Germany
2. Department of Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf Medical Faculty of Heinrich Heine University Düsseldorf Düsseldorf Germany
3. Department of Gastroenterology, Hepatology and Infectious Diseases, University Hospital Magdeburg Medical Faculty of Otto von Guericke University Magdeburg Germany
4. Department of Human Genetics Hannover Medical School Hannover Germany
5. Department of Paediatrics Helios Hospital Krefeld Germany
6. Translational Hepatology and Stem Cell Biology, Department of Gastroenterology, Hepatology and Endocrinology, REBIRTH‐Center for Translational Regenerative Medicine Hannover Medical School Hannover Germany
7. Institute of Diagnostic and Interventional Neuroradiology Hannover Medical School Hannover Germany
8. Institute of Immunology and Immunotherapy University of Birmingham Birmingham UK