1. Intensive Care and Department of Pediatric Surgery Erasmus Medical Center‐Sophia Children’s Hospital Rotterdam The Netherlands
2. Section of Physical Therapy Department of Orthopedics Erasmus Medical Center‐Sophia Children's Hospital Rotterdam The Netherlands
3. Child Development and Exercise Center Wilhelmina Children’s Hospital University Medical Center Utrecht The Netherlands
4. Department of Pediatrics Radboud University Medical Center‐Amalia Children’s Hospital Nijmegen The Netherlands
5. Department of Biostatistics Erasmus Medical Center Rotterdam The Netherlands