Affiliation: | 1. University Children’s Hospital, Pediatric Gastroenterology and Hepatology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;2. University Children’s Hospital Riga, Riga, Latvia;3. Department of Gastroenterology, Hepatology and Infectious Diseases, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany;4. Division for Pediatric Stem Cell Transplantation and Immunology, Clinic for Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany |