1. Department of Paediatric Neurology; University Children's Hospital; Berne Switzerland
2. Division of Neurosurgery; University of Cape Town; Cape Town South Africa
3. Department of Pediatric Neurology; VU University Medical Center; Amsterdam the Netherlands
4. Department of Physical Medicine and Rehabilitation; VU University Medical Center; Amsterdam the Netherlands
5. Neuroscience Campus Amsterdam; VU University Medical Center; Amsterdam the Netherlands
6. Division of Physiotherapy; Stellenbosch University; Tygerberg Cape Town South Africa