1. Department of Pediatric Oncology, Hematology and Immunology, Heidelberg, Germany
2. Department of Pediatric Oncology, Hematology and Hemostaseology, Leipzig University Hospital, Leipzig, Germany
3. Centre for Paediatric Medicine, Women's Clinic, Klinikum Stuttgart, Stuttgart, Germany
4. Institute of Sports and Sport Science, Ruprecht Karls University, Heidelberg, Germany
5. Institute of Exercise and Public Health, Faculty of Sport Science, Leipzig University, Leipzig, Germany
6. Department of Medical Oncology, National Center for Tumor Diseases and Heidelberg University Hospital, Heidelberg, Germany