1. Department of Paediatric Liver, Kidney and Metabolic Diseases, Division of Paediatric Gastroenterology and Hepatology, Hannover Medical School, Hannover, Germany
2. Institute of Transplant Immunology, Hannover Medical School, Hannover, Germany
3. Institute of Epidemiology and Social Medicine, University of Münster, Münster, Germany
4. Liver Unit, Birmingham Women’s & Children’s Hospital, University of Birmingham, Birmingham, UK
5. Pediatric Hepatology Unit, Hôpital Necker-Enfants malades, Paris, France
6. Paediatric Liver, GI and Transplantation, Ospedali Riuniti di Bergamo, Bergamo, Italy
7. Servicio de Hepatología y Transplante, Hospital Infantil Universitario La Paz Madrid, Madrid, Spain
8. Centrum Zdrowia Dziecka, Al. Dzieci Polskich, Warszawa, Poland
9. Department of Pediatrics, Gynecology, and Obstetrics, Swiss Pediatric Liver Center, University Hospitals Geneva, University of Geneva, Geneva, Switzerland