1. 1Department of Pathology, University Hospital Giessen and Marburg GmbH, Giessen, Germany
2. 2Children and Young People’s Cancer Services, University College London Hospitals NHS Foundation Trust, London, United Kingdom
3. 3Department of Cellular Pathology, University College London Hospitals NHS Foundation Trust, London, United Kingdom
4. 4Paediatric and Adolescent Haematology & Oncology Unit, Children’s Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom
5. 5School of Cancer Sciences, Cancer Research UK Clinical Trials Unit, University of Birmingham, Birmingham, United Kingdom
6. 6Royal Hospital for Children and Young People, Edinburgh, United Kingdom
7. 7Sorbonne University, Assistance Publique–Hôpitaux de Paris, Hôpital Armand-Trousseau, Paris, France
8. 8Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
9. 9Pediatric Hematology and Oncology, University Hospital Giessen and Marburg GmbH, Giessen, Germany
10. 10Medical Faculty of the Martin-Luther-University of Halle-Wittenberg, Halle, Germany