[1] Reade, Amsterdam Rheumatol & Immunol Ctr, Amste, Netherlands
[2] Vrije Univ Amsterdam Med Ctr, Amsterdam Rheumatol & Immunol Ctr, Amsterdam UMC, Amsterdam, Netherlands
[3] Sandwell & West Birmingham Hosp NHS Trust, Birmingham, England
[4] Univ Hosp Geneva, Div Rheumatol, Geneva, Switzerland
[5] Karolinska Inst, Rheumatol Unit, Dept Med, Stockholm, Stockholms Lan, Sweden
[6] Sandwell & West Birmingham Hosp NHS Trust, Birmingham, W Midlands, England
[7] Amsterdam UMC, Amsterdam, Netherlands