[1] North Tyneside Gen Hosp, Northumbria Healthcare NHS Fdn Trust, Dept Resp Med, North Shields, England
[2] Univ Manchester, Div Infect Immun & Resp Med, Manchester, England
[3] Kings Coll Hosp London, Dept Resp Med, London, England
[4] Kings Coll London, Fac Life Sci & Med, Ctr Human & Appl Physiol Sci, Sch Basic & Med Biosci, London, England
[5] Manchester Metropolitan Univ, Manchester, England
[6] Warminster Primary Care Ctr, Warminster, Wilts, England
[7] Manchester Univ NHS Fdn Trust, Wythenshawe Hosp, North West Lung Ctr, Manchester, England
[8] Manchester Univ NHS Fdn Trust, Manchester, England
[9] Queens Univ Belfast, Med, Belfast, North Ireland
[10] Univ Nottingham, Nottingham Resp Res Unit, Nottingham, England
[11] Castle Hill Hosp, Cottingham, England
[12] Univ Hull, Kingston Upon Hull, England
[13] Newcastle Upon Tyne Hosp NHS Fdn Trust, Newcastle Upon Tyne, England
[14] Newcastle Univ, Populat Hlth Sci Inst, Newcastle Upon Tyne, England
[15] Univ Southampton, Acad Unit Primary Care & Populat Sci, Southampton, England