[1] Salford Royal NHS Fdn Trust, Rheumatol Directorate, Stott Lane, Salford, Lancs, England
[2] Manchester Metropolitan Univ, Dept Hlth Profess, Fac Hlth Psychol & Social Care, All Saints Bldg, Manchester, Lancs, England
[3] East Sussex Healthcare NHS Trust, Eastbourne, England
[4] Univ Brighton, Res Ctr Hlth Care Profess, Brighton, E Sussex, England