1. Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children’s Memorial Health Institute, Warsaw, Poland
2. Department of Nuclear Medicine, The Children’s Memorial Health Institute, Warsaw, Portugal
3. Department of Pediatric Surgery and Transplantation, The Children’s Memorial Health Institute, Warsaw, Portugal
4. Department of Radiology, The Children’s Memorial Health Institute, Warsaw, Portugal
5. Department of Pediatric Surgery and Transplantation, The Children’s Memorial Health Institute, Warsaw, Poland
6. Department of Gastroenterology, Hepatology, Feeding Disorders and Pediatrics, The Children’s Memorial Health Institute, Warsaw, Portugal