[1] Univ Groningen, Dept Pulm Dis, Univ Med Ctr Groningen, Groningen, Netherlands
[2] European Resp Soc, Sci Act Dept, Lausanne, Switzerland
[3] Royal Brompton & Harefield Hosp, Dept Sleep & Ventilat, London, England
[4] Univ Paris Saclay, Sch Med, Le Kremlin Bicetre, France
[5] Univ Paris Saclay, Hop Bicetre, AP HP, Inserm UMR S 999,Serv Pneumol & Soins Intensifs R, Le Kremlin Bicetre, France
[6] Umea Univ, Sect Physiotherapy, Dept Community Med & Rehabil, Umea, Sweden
[7] Univ Groningen, Dept Mol Pharmacol, Groningen, Netherlands
[8] Imperial Coll London, Natl Heart & Lung Inst, London, England
[9] European Lung Fdn, Sheffield, S Yorkshire, England
[10] Patientenorg Alpha1 Deutschland eV, Gernsheim, Germany
[11] Univ Paris, Cochin Hosp, AP HP, Dept Pulmonol, Paris, France
[12] Univ Leicester, Leicester NIHR Biomed Res Ctr, Leicester, Leics, England