[1] Mater Misericordiae Univ Hosp, Adv Lung Dis & Transplant Programme, Dublin, Ireland
[2] Univ Bristol, Sch Clin Sci, Acad Resp Unit, Bristol, Avon, England
[3] Royal Brompton Hosp, Interstitial Lung Dis Unit, London SW3 6LY, England
[4] Natl Heart & Lung Inst, London, England