1. Biomedical Center, Faculty of Medicine Charles University in Pilsen Pilsen Czech Republic
2. Division of Cancer Epidemiology German Cancer Research Center (DKFZ) Heidelberg Germany
3. Hopp Children's Cancer Center (KiTZ) Heidelberg Germany
4. Division of Pediatric Neurooncology German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK) Heidelberg Germany
5. Division of Genetics and Epidemiology The Institute of Cancer Research London UK
6. The Department of Haemato‐Oncology The Royal Marsden Hospital NHS Foundation Trust London UK