[1] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, Leeds, England
[2] Leeds Teaching Hosp NHS Trust, NIHR Leeds Biomed Res Ctr, Leeds, England
[3] Univ Cattolica Sacro Cuore, Univ A Gemelli IRCCS, Fdn Policlin, Div Rheumatol, Rome, Italy
[4] Royal Brompton Hosp London, Dept Interstitial Lung Dis, London, England