1. Division of Pediatric Hematology/Oncology Department of Pediatrics and Adolescent Medicine Medical University of Graz Graz Austria
2. Children’s University Hospital University of Tuebingen Tuebingen Germany
3. Department of Pediatric Hematology, Oncology, Hemostaseology and Stem Cell Transplantation Dr. von Hauner University Children’s Hospital Ludwig Maximilian University Munich Munich Germany
4. Department of Blood Group Serology and Transfusion Medicine Medical University Graz Graz Austria