| Affiliation: | 1. Astrid Lindgren Children's Hospital, Karolinska University Hospital andDepartment of Women's and Children's Health, Childhood Cancer Research Unit, Karolinska Institutet, Stockholm, Sweden;2. Department of Radiology, Helsinki University Hospital, Helsinki, Finland;3. Department of Paediatrics and Adolescent Medicine, The University Hospital Rigshospitalet, Copenhagen, Denmark;4. Children and Adolescents Hospital, Helsinki University Hospital, Helsinki, Finland;5. Department of Pediatrics, Sahlgrenska University Hospital, Gothenburg, Sweden;6. Department of Children and Adolescents, Oulu University Hospital, Oulu, Finland;7. Faculty of Medicine, The Institute of Gynecology, Obstetrics, and Pediatrics, University of Copenhagen, Denmark |
