[1] Univ Birmingham, Russells Hall Hosp, Teaching Trust, Dudley Grp NHS Fdn Trust,Dept Rheumatol, Pensnett Rd, Dudley DY1 2HQ, W Midlands, England
[2] Univ Birmingham, Russells Hall Hosp, Teaching Trust, Dudley Grp NHS Fdn Trust,Dept Res & Dev, Pensnett Rd, Dudley DY1 2HQ, W Midlands, England
[3] South Kazakhstan Med Acad, Dept Biol & Biochem, Shymkent, Kazakhstan
[4] Kuban State Univ, Dept Mkt & Trade Deals, Krasnodar, Russia
[5] Ind Univ Tyumen, Dept Econ & Org Prod, Tyumen, Russia
[6] Univ Manchester, Arthrit Res UK Epidemiol Unit, Manchester, Lancs, England