1. Department of Oncology‐Pathology Karolinska Institute Stockholm Sweden
2. Department of Haematology and Bone Marrow Transplantation National and Kapodistrian University of AthensLaikon General Hospital AthensGreece
3. Department of Pathology University of Crete Medical School Heraklion Crete Greece
4. Department of Women's and Children's Health Karolinska Institute StockholmSweden
5. Theme Paediatrics Paediatric Oncology Karolinska University Hospital Stockholm Sweden
6. Department of Hematopathology The University of Texas MD Anderson Cancer Center Houston TX USA
7. Department of Haematology Athens Medical Center Psychikon Branch Athens Greece