1. Department of Anaesthesiology, Erasmus MC-Sophia Children’s Hospital University Medical Centre, Rotterdam, The Netherlands
2. Department of Paediatric Surgery, Erasmus MC-Sophia Children’s Hospital University Medical Centre, Rotterdam, The Netherlands
3. Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC-Sophia Children’s Hospital University Medical Centre, Rotterdam, The Netherlands, and
4. Department of Orthopaedics, Section of Physical Therapy, Erasmus MC-Sophia Children’s Hospital University Medical Centre, Rotterdam, The Netherlands