1. UCL Institute of Orthopaedics and Musculoskeletal Science, Stanmore Campus; Royal National Orthopaedic Hospital; Brockley Hill, Stanmore Middlesex HA7 4LP UK
2. Central Laser Facility, Research Complex at Harwell, Science and Technology Facilities Council; Rutherford Appleton Laboratory; Harwell Oxford, Didcot Oxfordshire OX11 0QX UK