1. North of England Bone and Soft Tissue Tumour Service, Department of Orthopaedics, Freeman Hospital, Newcastle upon Tyne, UK;
2. Royal National Orthopaedic Hospital NHS Trust, Stanmore, London, UK;
3. Royal Orthopaedic Hospital NHS Foundation Trust, Birmingham, UK;
4. Oxford University Hospitals NHS Foundation Trust, Oxford, UK;
5. Robert Jones and Agnes Hunt NHS Foundation Trust, Oswestry, UK