1. Hematology, Hemostasis, Oncology and Stem Cell Transplantation Hannover Medical School Hannover Germany
2. Division of Pediatric Hematology and Oncology Department of Pediatrics and Adolescent Medicine Medical Center Faculty of Medicine University of Freiburg Freiburg Germany
3. Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation Department of Surgery University of Groningen University Medical Center Groningen Groningen The Netherlands