1. Pediatric Hepatology, Gastroenterology and Transplantation, ASST Papa Giovanni XXIII Bergamo Italy
2. Department of Pediatrics, Pediatric Infectious Diseases, Immunology and Allergology Shupyk National Medical University of Ukraine Kyiv Ukraine
3. Department of Anatomopathology ASST Papa Giovanni XXIII Bergamo Italy
4. Department of Pediatrics, Vittore Buzzi Children's Hospital University of Milan Milan Italy