[1] Imperial Coll London, Natl Heart & Lung Inst, Emmanuel Kaye Bldg, London SW3 6LY, England
[2] Ctr Med Imaging Comp, London, England
[3] Resp Med, London, England
[4] UCL, London, England
[5] Guys & St Thomas NHS Fdn Trust, Royal Brompton & Harefield Clin Grp, London, England
[6] Univ Leicester, Dept Hlth Sci, Leicester, Leics, England
[7] Leicester NIHR Biomed Res Ctr, Leicester, Leics, England
[8] Usher Inst, Edinburgh, Midlothian, Scotland
[9] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[10] North Bristol NHS Trust, Bristol, Avon, England
[11] Leeds Teaching Hosp NHS Fdn Trust, Leeds, W Yorkshire, England
[12] Sheffield Teaching Hosp NHS Fdn Trust, Sheffield, S Yorkshire, England
[13] Univ Manchester, Manchester, Lancs, England
[14] Ninewells Hosp & Med Sch, Dundee, Scotland
[15] Univ Nottingham, Nottingham, England
[16] Univ Sheffield, Sheffield, S Yorkshire, England
[17] Royal Devon & Exeter NHS Fdn Trust, Exeter, Devon, England
[18] Oxford Univ Hosp NHS Fdn Trust, Oxford, England
[19] Univ Coll London Hosp, London, England
[20] Asthma Lung UK, London, England
[21] Univ Southampton, Fac Med, Southampton, Hants, England
[22] Univ Birmingham, Birmingham, England
[23] Manchester Univ NHS Fdn Trust, Manchester, Lancs, England
[24] Univ Oxford, Oxford, England
[25] Univ Liverpool, Liverpool, Merseyside, England
[26] Newcastle Univ, Newcastle, NSW, Australia
[27] Perth Royal Infirm, NHS Tayside, Perth, Scotland
[28] Liverpool Univ Hosp NHS Fdn Trust, Liverpool, Merseyside, England