1. Department of Paediatrics and Adolescent Medicine Aarhus University Hospital Aarhus Denmark
2. Department of Pediatrics and Adolescent Medicine, Hematopoietic Stem Cell Transplantation and Immunodeficiency Copenhagen University Hospital – Rigshospitalet Copenhagen Denmark
3. Hans Christian Andersen Children's Hospital Odense University Hospital Odense Denmark
4. Department of Molecular Medicine Aarhus University Hospital Aarhus Denmark
5. Department of Hematology St. Jude Children's Research Hospital Memphis Tennessee USA
6. Department of Pediatrics and Adolescent Medicine, Division of Pediatric Hematology and Oncology, Medical Center, Faculty of Medicine University of Freiburg Freiburg Germany