Affiliation: | 1. Childhood Cancer Research Group, Danish Cancer Society Research Center, Copenhagen, Denmark;2. Unit of Statistics and Data Analysis, Danish Cancer Society Research Center, Copenhagen, Denmark;3. Department of Clinical Sciences, Lund University, Lund, Sweden;4. Finnish Cancer Registry, University of Helsinki, Helsinki, Finland;5. Icelandic Cancer Registry, Reykjavik, Iceland Faculty of Medicine, University of Iceland, Reykjavik, Iceland;6. Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas;7. Cancer Registry of Norway, Oslo, Norway Department of Paediatric Haematology and Oncology, Oslo University Hospital, Oslo, Norway;8. Department of Clinical Sciences, Lund University, Lund, Sweden Pediatric Oncology and Hematology, Skane University Hospital, Lund, Sweden;9. Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark;10. Childhood Cancer Research Group, Danish Cancer Society Research Center, Copenhagen, Denmark Department of Clinical Medicine, Faculty of Health, Aarhus University and University Hospital, Arhus, Denmark |