1. Department of Mechanical Engineering; Imperial College London; Exhibition Road London SW7 2AZ United Kingdom
2. Guy's Hospital; Great Maze Pond London SE1 9RT United Kingdom
3. Department of Orthopaedic Surgery; Newcastle Freeman University Hospital; Newcastle upon Tyne United Kingdom
4. Musculoskeletal Surgery Group, Department of Surgery and Cancer; Imperial College London School of Medicine, Charing Cross Hospital; London W6 8RF United Kingdom