[1] Kings Coll Hosp NHS Trust, Dept Rheumatol, London, England
[2] Kings Coll London, Dept Acad Rheumatol, London, England
[3] Guys & St Thomas NHS Trust, London, England
[4] Royal Brompton & Harefield Hosp, Interstitial Lung Dis Unit, London, England
[5] Univ Hosp Lewisham, Dept Rheumatol, London, England
[6] Marques Valdecilla Univ Hosp, Div Rheumatol, Santander, Spain
[7] Kings Coll Hosp NHS Trust, Dept Resp Med, London, England
[8] Kings Coll Hosp NHS Trust, Dept Radiol, London, England