1. Royal National Orthopaedic Hospital, Brockley Hill, HA7 4LP, Stanmore, UK
2. Guy’s and St Thomas’ NHS Foundation Trust, Westminster Bridge Rd, SE1 7EH, London, UK
3. Royal Brompton and Harefield NHS Foundation Trust, Britten St, SW3 6NJ, London, UK
4. UCL Cancer Institute, 72 Huntley St, WC1E 6DD, London, UK
5. University College London Hospitals NHS Trust, 235 Euston Rd, NW1 2BU, London, UK