[1] Royal Liverpool & Broadgreen Univ Hosp, Liverpool, Merseyside, England
[2] Royal Natl Hosp Rheumat Dis, RACE, Bath BA1 1RL, Avon, England
[3] Univ Bath, Sch Hlth, Bath BA2 7AY, Avon, England
[4] Walsgrave Gen Hosp, Dept Rheumatol, Coventry Walsgrave NHS Trust, Coventry CV2 2DY, W Midlands, England
[5] N Middlesex Hosp, Dept Rheumatol, London N18 1QX, England
[6] Harold Wood Hosp, Dept Rheumatol, Ramford, Essex, England
[7] Royal Hallamshire Hosp, Dept Rheumatol, Sheffield S10 2JF, S Yorkshire, England
[8] Middlesex Hosp, Bloomsburg Rheumatol Unit, London, England
[9] St Helens Hosp, St Helens, Merseyside, England
[10] Yeovil Dist Hosp, Yeovil, Somerset, England
[11] Queen Alexandra Hosp, Portsmouth, Hants, England