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