1. Department of Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
2. Department of Pediatric Haematology and Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
3. Department of Clinical Physiology, Nuclear Medicine and PET, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
4. Department of Pediatrics, H.C. Andersen Children’s Hospital, University of Odense, Odense, Denmark
5. Department of Pediatric and Adolescent Health, Aarhus University Hospital, Aarhus, Denmark