1. NIHR Surgical Reconstruction and Microbiology Research Centre University Hospital Birmingham B15 2WB Birmingham, UK
2. School of Sport, Exercise and Rehabilitation Sciences University of Birmingham Birmingham, UK
3. MRC-Arthritis Research UK Centre for Musculoskeletal Ageing Research, Institute of Inflammation and Ageing Birmingham University Medical School B15 2TT Birmingham, UK
4. NIHR Biomedical Research Centre University Hospital Birmingham Birmingham, UK
5. Royal Centre for Defence Medicine Birmingham Research Park B15 2SQ Birmingham, UK