[1] Univ Cambridge, Cambridge, England
[2] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England
[3] Wales Heart Res Inst, Cardiff, S Glam, Wales
[4] Royal Brompton & Harefield NHS Fdn Trust, London, England
[5] UCL, London, England
[6] Royal Free Hosp NHS Fdn Trust, London, England
[7] Univ Nottingham, Nottingham Resp Res Unit, Nottingham NG7 2RD, England
[8] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[9] Univ Liverpool, Liverpool L69 3BX, Merseyside, England
[10] GlaxoSmithKline, King Of Prussia, PA USA