[1] Univ Oxford, Nuffield Dept Med Expt Med, Resp Med Unit, Oxford, England
[2] Katholieke Univ Leuven, UZ Leuven, Res Grp BREATHE, Dept Resp Dis, Leuven, Belgium
[3] Paris Descartes, CPSC, Fac Med, Paris, France
[4] Univ Ferrara, Dept Med Sci, Ferrara, Italy
[5] Maastricht Univ, Dept Resp Med, Med Ctr, Maastricht, Netherlands
[6] Glenfield Hosp, NIHR Leicester Biomed Res Ctr Resp, Leicester, Leics, England
[7] Philipps Univ, Univ Med Ctr Giessen & Marburg, Dept Med Pulm & Crit Care Med, Marburg, Germany
[8] German Ctr Lung Res DZL, Marburg, Germany
[9] IDIBAPS August Pi & Sunyer Biomed Res Inst, Barcelona, Spain
[10] Imperial Coll, Natl Heart & Lung Inst, London, England
[11] SU Sahlgrenska, Inst Med, Dept Internal Med & Clin Nutr, Gothenburg, Sweden
[12] German Ctr Lung Res DZL, Airway Res Ctr North ARCN, LungenClin Grosshansdorf, Pulm Res Inst, Grosshansdorf, Germany