1. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
2. Department of Psycho‐Oncology Princess Máxima Center for Pediatric Oncology Utrecht the Netherlands
3. Department of clinical psychology Utrecht University Utrecht The Netherlands
4. ARQ National Psychotrauma Centre Diemen The Netherlands
5. Wilhelmina Children's Hospital, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
6. Center for Research and Development of Education, University Medical Center Utrecht Utrecht University Utrecht The Netherlands