[1] Univ Amsterdam, Amsterdam UMC, Radiol & Nucl Med, Amsterdam, Netherlands
[2] Amsterdam UMC, Emma Childrens Hosp, Dept Paediat Resp Med, Amsterdam, Netherlands
[3] Univ Copenhagen, Herlev & Gentofte Hosp, COPSAC Copenhagen Prospective Studies Asthma Child, Copenhagen, Denmark
[4] Univ Med Ctr Groningen, Beatrix Childrens Hosp, Dept Pediat Pulmonol & Allergol, Groningen, Netherlands
[5] Erasmus MC, Dept Pediat Pediat Pulmonol & Allergol, Rotterdam, Netherlands
[6] Univ Maribor, Fac Med, Ctr Human Mol Genet & Pharmacogen, Maribor, Slovenia
[7] Univ Regensburg, Univ Childrens Hosp Regensburg KUNO, Dept Pediat Pneumol & Allergy, Hosp St Hedwig Order St John, Regensburg, Germany
[8] Univ Regensburg, Univ Childrens Hosp Regensburg KUNO, Sci & Dev Campus Regensburg WECARE, Dept Neonatol,Hosp St Hedwig Order St John, Regensburg, Germany
[9] Hosp Univ Donostia, Div Pediat Resp Med, San Sebastian, Spain
[10] Univ La Laguna, Dept Biochem Microbiol Cell Biol & Genet, Genom & Hlth Grp, San Cristobal De La Lagun 38200, Spain
[11] Christian Albrechts Univ Kiel, Inst Clin Mol Biol, Kiel, Germany
[12] Univ Amsterdam, Emma Childrens Hosp, Pediat Intens Care Unit, Amsterdam UMC, Amsterdam, Netherlands
[13] Imperial Coll London, Natl Heart & Lung Inst, Royal Brompton & Harefield NHS Trust, London, England
[14] Univ Manchester, Fac Biol Med & Hlth, Sch Biol Sci, Div Immunol Immun Infect & Resp Med, Manchester, England
[15] Manchester Acad Hlth Sci Ctr, Manchester, England
[16] Manchester Univ Hosp NHS Fdn Trust, NIHR Biomed Res Ctr, Manchester, England
[17] Univ Basel, Univ Childrens Hosp Basel, Basel, Switzerland
[18] Univ Childrens Hosp Bern, Bern, Switzerland
[19] Karolinska Inst, Karolinska Univ Hosp, Astrid Lindgren Childrens Hosp, Stockholm, Sweden
[20] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[21] Acclarogen Ltd, St Johns Innovat Ctr, Cambridge, England
[22] GlaxoSmithKline, Resp Therapeut Unit, Stockley Pk, England
[23] Univ Utrecht, Utrecht Inst Pharmaceut Sci UIPS, Fac Sci, Div Pharmacol, Utrecht, Netherlands
[24] Univ Southampton, NIHR Southampton Resp Biomed Res Unit, Clin & Expt Sci & Human Dev & Hlth, Southampton, England