1. Department of Pediatric Hematology/Oncology, West German Cancer Centre, Clinic for Pediatrics III, University Hospital Essen, Essen, Germany
2. Department of Pediatric Oncology, Hematology and Hemostaseology, University Hospital Leipzig, Leipzig, Germany
3. Division of Medical Oncology, Working Group Exercise Oncology, University Hospital Heidelberg and National Center for Tumor Diseases (NCT), Heidelberg, Germany
4. Institute of Sports Medicine, Hannover Medical School (MHH), Hannover, Germany
5. Department of Sport and Health Sciences, Institute of Preventive Pediatrics, Technical University of Munich, Munich, Germany
6. Kinderklinik München Schwabing, Department of Pediatrics and Children’s Cancer Research Center, TUM School of Medicine, Technical University of Munich, Munich, Germany