1. Childhood Cancer Research Unit Department of Women’s and Children’s Health Karolinska Institutet StockholmSweden
2. Pediatric Oncology Astrid Lindgrens Children’s Hospital Karolinska University Hospital StockholmSweden
3. Center for Infectious Medicine Department of Medicine Huddinge Karolinska Institutet StSweden
4. Department of Clinical Pathology Karolinska University Laboratory StockholmSweden
5. Department of Clinical Neuroscience Karolinska Institutet StockholmSweden
6. Department of Neuroradiology Karolinska University Hospital Stockholm Sweden
7. Department of Pediatric Hematology and Oncology Oslo University Hospital OsloNorway
8. Department of Pediatrics Division of Child and Adolescent Health University Hospital of North‐Norway Tromsø Norway
9. Department of Pediatric Hematology and Oncology Umeå University Hospital UmeåSweden
10. Hallands Hospital HalmstadSweden
11. Clinical Neurochemistry Laboratory Sahlgrenska University Hospital MölndalSweden
12. Department of Psychiatry and Neurochemistry Institute of Neuroscience and Physiology the Sahlgrenska Academy at the University of Gothenburg Mölndal Sweden
13. UK Dementia Research Institute at UCL London UK
14. Department of Neurodegenerative Disease UCL Institute of Neurology London UK