1. Department of Pathology, Hematopathology Section University Hospital Schleswig‐Holstein Christian‐Albrecht‐University of Kiel Kiel Germany
2. Department of Pathology Queen Mary Hospital The University of Hong Kong Hong Kong SAR China
3. Department of Paediatric Haematology and Oncology University Children's Hospital Münster Germany
4. Department of Paediatric Haematology and Oncology Hannover Medical School Hanover Germany
5. Institute of Human Genetics Ulm University & Ulm University Medical Center Ulm Germany
6. Department of Paediatric Haematology and Oncology University Hospital Hamburg‐Eppendorf Hamburg Germany