1. Department of Pediatrics Medical School University of Salerno Salerno Italy
2. Department of Pediatrics University of Naples “Federico II” Naples Italy
3. Department of Gastroenterology, Hepatology, and Eating Disorders Children's Memorial Health Institute Warsaw Poland
4. Liver Unit King's College London
5. Liver Unit Birmingham Children's Hospital Birmingham UK
6. Division of Pediatric Gastroenterology and Hepatology Hannover Medical School Hannover Germany
7. Department of Pediatrics Istanbul Medical Faculty University of Istanbul Turkey
8. Hopital Necker‐Enfants Malades Paris France
9. Department of Pediatrics University of Geneva Hospital Geneva Switzerland
10. Hepatometabolic Unit “Bambino Gesù” Children's Hospital Rome Italy