[1] University of Copenhagen,Department of Pediatrics and Adolescent Medicine, Rigshospitalet
[2] University of Copenhagen,Department of Clinical Immunology, Rigshospitalet
[3] University of Copenhagen,Section of Biostatistics, Department of Public Health
[4] Sahlgrenska University Hospital,Department of Pediatrics, Institution of Clinical Sciences
[5] Aarhus University Hospital,Children and Adolescent Health
[6] Uppsala University,Department of Women’s and Children’s Health
[7] Turku University Hospital and Turku University,Department of Pediatric and Adolescent Medicine
[8] Oulu University Hospital and PEDEGO Research Unit,Department of Pediatrics
[9] University of Oulu,Department of Pediatrics
[10] Skåne University Hospital,Department of Pediatrics
[11] Oslo University Hospital,Center for Pediatric Oncology and Hematology, Children’s hospital
[12] Affiliate of Vilnius University Hospital Santaros Klinikos and Vilnius University,Division of Pediatric Hematology, Oncology and Stem Cell Transplantation, Children and Adolescents
[13] Helsinki University Hospital,Institute of Clinical Medicine, Faculty of Health and Medical Sciences
[14] University of Copenhagen,Department of Pediatric Hematology and Oncology, H.C. Andersen Children’s Hospital
[15] Odense University Hospital,Department of Women’s and Children’s Health, Pediatrics
[16] University of Uppsala,Department of Medical Biosciences, Genetics
[17] Umeå University Hospital,Department of Pediatrics
[18] Linköping University Hospital,Department of Paediatrics
[19] St. Olavs University Hospital Trondheim,Department of Pediatrics
[20] Kuopio University Hospital,Institute of Clinical Medicine
[21] University of Eastern Finland,Department of Pediatrics
[22] Bergen Hospital,undefined