1. Childhood Cancer Research Unit; Astrid Lindgren Children's Hospital; Karolinska University Hospital and Karolinska Institute; Stockholm Sweden
2. Department of Clinical Sciences; Pediatrics; Umeå University; Umeå Sweden
3. Department of Pathology and Cytology; Division of Hematopathology; Karolinska University Hospital Solna; Stockholm Sweden
4. Department of Pathology and Cytology; Division of Clinical Cytology; Karolinska University Hospital Solna; Stockholm Sweden
5. Department of Laboratory Medicine and Pathobiology; University Health Network; Toronto ON Canada
6. Department of Medical Biosciences; Pathology; Umeå University; Umeå Sweden