Philip G. Conaghan, Professor of Musculoskeletal Medicine,, University of Leeds, Consultant Rheumatologist,, Leeds Teaching Hospitals NHS Trust and , Leeds Primary Care Trust, UK Philip J. O’Connor, Consultant Musculoskeletal Radiologist,, Department of Clinical Radiology,, Leeds Teaching Hospitals Trust, UK David A. Isenberg, ARC Diamond Jubilee Professor of Rheumatology,, Centre for Rheumatology,, Department of Medicine,, University College London, UK