1 Medical Research Council Versus Arthritis Centre for Integrated Research into Musculoskeletal Ageing, Newcastle University, Newcastle Upon Tyne, UK Fraser.Birrell@ncl.ac.uk.
2 Rheumatology, Northumbria Healthcare NHS Foundation Trust, Northumberland and North Shields, UK.
3 Faculty of Health and Life Sciences, Northumbria University, Northumberland and North Shields, UK.
4 Masters of Clinical Research Programme, Newcastle University, Newcastle Upon Tyne, UK.