[1] Royal Brompton & Harefield NHS Fdn Trust, Harefield, Middx, England
[2] Royal Brompton & Harefield NHS Fdn Trust, Resp Med, Harefield, Middx, England
[3] Royal Brompton & Harefield NHS Fdn Trust, Med Stat Res & Dev, Harefield, Middx, England
[4] Royal Brompton & Harefield NHS Fdn Trust, Res Nursing, Chelsea, England
[5] Royal Brompton & Harefield NHS Fdn Trust, Harefield Pulm Rehabil & Muscle Res Grp, Harefield, Middx, England
[6] Hillingdon Hosp NHS Fdn Trust, Hillingdon, England
[7] Kings Coll London, Cicely Saunders Inst Palliat Care Policy & Rehab, London, England
[8] Univ East Anglia, Sch Hlth Sci, Norwich, Norfolk, England
[9] Natl Heart & Lung Inst, Airways Dis, London, England
[10] Royal Brompton & Harefield NHS Trust, Harefield, Middx, England