Shane Barwood* MB BS, Research Fellow;
Charles Baillieu MB BS, Research Assistant;
Roslyn Boyd BSc BAppSc, Senior Research Physiotherapist,The Hugh Williamson Gait Analysis Laboratory;
Kate Brereton RN, Clinical Nurse Supervisor;
Janette Low MB BS FANZCA, Consultant Anaesthetist, TheDepartment of Anaesthetics and Pain Service;
Gary Nattrass MD FRACS, Consultant Orthopaedic Surgeon;
H Kerr Graham MD FRCS (Ed) FRACS, Professor of Orthopaedic Surgery, The Department of OrthopaedicSurgery, The Royal Children’s Hospital, Flemington Road,Parkville 3052, Victoria, Australia.
*Correspondence to ﬁrst author at above address.