1. University of Oxford; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS); Botnar Research Centre Old Road Oxford UK OX3 7LD
2. Birmingham VA Medical Center; Department of Medicine; Faculty Office Tower 805B 510 20th Street South Birmingham AL USA 35294
3. University of Oxford; Oxford Clinical Trials Research Unit; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences Windmill Road Oxford Oxfordshire UK OX3 7LD