1. Department of Pediatrics and Adolescent Medicine; University Hospital Rigshospitalet; Copenhagen Denmark
2. Department of Pediatric Oncology; Astrid Lindgren Children's Hospital; Karolinska Hospital; Stockholm Sweden
3. Department of Pediatric and Adolecent Medicine; Turku University Hospital and University of Turku; Finland
4. Department of Pediatric Oncology; Skane University Hospital; Lund Sweden
5. Medical Imaging of Southwest Finland, University of Turku; Turku Finland
6. Department of Molecular Medicine and Surgery; Center for Molecular Medicine; Karolinska Institutet; Stockholm Sweden
7. Department of Clinical Genetics; Karolinska University Hospital; Stockholm Sweden
8. Children's Hospital; University of Helsinki and Helsinki University Hospital; Helsinki Finland