1. Van Creveldkliniek University Medical Center UtrechtUtrecht University Utrecht The Netherlands
2. Center for Child Development, Exercise and Physical Literacy University Medical Center UtrechtUtrecht UniversityUniversity Children’s Hospital Utrecht The Netherlands
3. Department of Nursing Division of Hematology/Oncology The Hospital for Sick Children Toronto ON Canada
4. Child Health Evaluative SciencesThe Hospital for Sick Children Toronto ON Canada
5. Clinic of Children’s Diseases Faculty of Medicine Vilnius University Vilnius Lithuania
6. Centre for Outcomes and Experience Research in Children’s Health, Illness and Disability (ORCHID Great Ormond Street Hospital for Children NHS Foundation Trust London UK