| Affiliation: | 1. Department of Pediatrics, Aarhus University Hospital Skejby, , Aarhus, Denmark;2. Department of Growth and Reproduction, Faculty of Health and Medical Sciences, University of Copenhagen, , Copenhagen, Denmark;3. Department of Pediatrics, University Hospital Oslo, , Rikshospitalet, Oslo, Norway;4. Children's Hospital, Helsinki University Central Hospital, , Helsinki, Finland;5. Department of Pediatric Oncology, The Queen Silvia Children's Hospital, , Gothenburg, Sweden;6. Department of Pediatrics, Landspitalinn University Hospital, , Reykjavik, Iceland;7. Pediatric Oncology Unit, Astrid Lindgren Children's Hospital, , Stockholm, Sweden;8. Department of Women's and Children's Health, Karolinska Institutet, , Stockholm, Sweden;9. Department of Pediatrics and Adolescent Medicine, University Hospital Rigshospitalet, , Copenhagen, Denmark |
