1. CanChild Centre for Childhood Disability Research McMaster University Hamilton Canada
2. Research Group Lifestyle and Health HU University of Applied Health Sciences Utrecht Utrechtthe Netherlands
3. Child Development and Exercise Center Wilhelmina Children’s Hospital, University Medical Center Utrecht Utrecht the Netherlands
4. Child Health & Exercise Medicine Program, Department of Pediatrics McMaster University Hamilton Canada
5. Department of Rehabilitation Medicine Erasmus MC University Medical Center Rotterdamthe Netherlands
6. Netherlands Institute for Health Services Research Utrecht the Netherlands