1. Department of Pediatric Hematology/Oncology, Clinic for Pediatrics III, West German Cancer Centre University Hospital Essen Essen Germany
2. Department of Pediatric Oncology/Hematology, Charité‐Universitätsmedizin Berlin Berlin Germany
3. Department I of Internal Medicine Center for Integrated Oncology Aachen Bonn Cologne Dusseldorf, University Hospital of Cologne Cologne Germany
4. Working Group Exercise Oncology, Department of Medical Oncology University Clinic Heidelberg and National Center for Tumor Diseases (NCT) Heidelberg Germany
5. Faculty of Medicine Westfälische Wilhelms‐Universität Münster Münster Germany
6. Department of Sport and Health Sciences Institute of Preventive Pediatrics, Technical University of Munich Munich Germany
7. Department of Pediatrics and Children's Cancer Research Center Kinderklinik München Schwabing, TUM School of Medicine, Technical University of Munich Munich Germany