1. Department of Orthopaedic Surgery Nemours/Alfred I. duPont Hospital for Children Wilmington DE USA
2. Department of Orthopaedic Surgery University of Melbourne Melbourne VictoriaAustralia
3. Hugh Williamson Gait Laboratory Royal Children’s Hospital Melbourne Victoria Australia
4. Paediatric Neurosciences Guy’s and St Thomas’ Foundation NHS Trust Evelina Children’s Hospital London UK