1. Pediatric Infectious Diseases Department of Women's and Children's Health University Hospital of Padova Padova Italy
2. La Paz Institute of Biomedical Research ‐ IdiPAZLa Paz University Hospital Madrid Spain
3. Pediatric Nephrology, Dialysis and Transplant Unit Department of Women's and Children's Health University Hospital of Padova Padova Italy
4. Pediatric Gastroenterology Digestive Endoscopy, Hepatology and Care of the Child with Liver Transplantation Department of Women's and Children's Health University Hospital of Padova Padova Italy
5. Pediatric Surgery Department of Women's and Children's Health University Hospital of Padova Padova Italy
6. Pediatric Hematology, Oncology and Stem Cell Transplant Division Department of Women's and Children's Health University Hospital of Padova Padova Italy
7. Pediatric Hepatology Department La Paz University Hospital Madrid Spain
8. Pediatric Gastroenterology Intestinal Rehabilitation Unit La Paz University Hospital Madrid Spain
9. Pediatric Nephrology Department La Paz University Hospital Madrid Spain
10. Pediatric Cardiology Department La Paz University Hospital Madrid Spain
11. Pediatric Hemato‐Oncology Department La Paz University Hospital Madrid Spain
12. Pediatric Pneumology Department La Paz University Hospital Madrid Spain
13. Pediatric Nephrology and Kidney Transplantation Unit Pediatrics Department Faculdade de Medicina Hospital de Santa MariaUniversidade de Lisboa Lisbon Portugal
14. Department of Pediatric Nephrology Pediatric Service Centro Materno Infantil do NorteCentro Hospitalar do Porto Porto Portugal
15. Department of Pediatric Surgery Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
16. Department of Pediatric Surgery and Organ Transplantation Children's Memorial Health Institute Warsaw Poland
17. Pediatric Surgery Department Hospital du Kremlin Bicêtre Le Kremlin Bicêtre France
18. Service of Pediatric Nephrology Hôpital Necker‐Enfants MaladesAP‐HPUniversité de Paris Descartes Paris France
19. Pediatric Hepatology Unit, Reference Center for Biliary Atresia and Genetic cholestasis Hôpital Necker‐Enfants MaladesAP‐HPUniversité Paris Centre Paris France
20. Pediatric Hepatology and Liver Transplantation ISMETT UPMC Palermo Palermo Italy
21. Department of Transplantation Surgery Karolinska University Hospital Stockholm Sweden
22. Department of Pediatric Hepatology Karolinska University HospitalCLINTECKarolinska Institutet Stockholm Sweden
23. Department of Pediatric Nephrology Karolinska University Hospital Stockholm Sweden
24. Pediatric Liver Gastrointestinal and Nutrition Centre King's College London School of Medicine at King's College Hospital London UK
25. Division of Pediatric Gastroenterology and Hepatology Hannover Medical School Children's Hospital Hannover Germany
26. Clinic for Pediatric Pneumology, Allergology, and Neonatology Hannover Medical School Hannover Germany
27. Centre for Pediatric Hepatology, Gastroenterology and Transplantation Hospital Papa Giovanni XXIII Bergamo Italy
28. Department of Hepatology and Gastroenterology Bambino Gesù Children Hospital Rome Italy
29. Section of Pediatric Oncology/Hematology Department of Pediatrics Skåne University Hospital Lund Sweden
30. Laboratoire d'Hépatologie Pédiatrique et Thérapie Cellulaire Unité PEDI Institut de Recherche Expérimentale et Clinique Université catholique de Louvain (UCLouvain) Brussels Belgium
31. Service de Gastroentérologie et Hépatologie Pédiatrique Département de Pédiatrie Cliniques Universitaires Saint‐LucUniversité catholique de Louvain (UCLouvain) Brussels Belgium
32. Pediatric Blood and Marrow Transplantation Program Prinses Maxima Centrum Utrecht Netherlands
33. Faculty of Medicine, Nephrology Center Vilnius University Vilnius Lithuania
34. Centre for Pediatric Oncology and Haematology Children's HospitalVilnius University Hospital Vilnius Lithuania