[1] Univ Birmingham, Rheumatol Res Grp, Birmingham, W Midlands, England
[2] Univ Birmingham, Ctr Endocrinol Diabet & Metab, Birmingham, W Midlands, England
[3] Univ Hosp Birmingham NHS Fdn Trust, Birmingham, W Midlands, England
[4] Univ Leeds, Leeds, W Yorkshire, England
[5] Sandwell & West Birmingham Hosp NHS Trust, Birmingham, W Midlands, England
[6] Univ Sydney, Concord Repatriat Gen Hosp, ANZAC Res Inst, Sydney, NSW 2006, Australia