[1] Univ Groningen, Univ Med Ctr Groningen, Beatrix Childrens Hosp, Dept Pediat Pulmonol & Pediat Allergol, Groningen, Netherlands
[2] Univ Groningen, Univ Med Ctr Groningen, Groningen Res Inst Asthma & COPD GRIAC, Groningen, Netherlands
[3] MIcompany, Amsterdam, Netherlands
[4] Univ Groningen, Univ Med Ctr Groningen, Dept Med Oncol, Groningen, Netherlands
[5] Univ Southampton, Fac Med, Human Dev & Hlth, Southampton, England
[6] Aberystwyth Univ, Dept Comp Sci, Aberystwyth, Wales
[7] Univ Hosp Southampton NHS Fdn Trust, Natl Inst Hlth, Southampton, England
[8] Univ Hosp Southampton NHS Fdn Trust, Care Res Southampton Biomed Res Ctr, Southampton, England
[9] Univ Groningen, Univ Med Ctr Groningen, Dept Pathol & Med Biol, Groningen, Netherlands
[10] Imperial Coll London, Natl Heart & Lung Inst, London, England
[11] Natl Inst Hlth Care Res Imperial Biomed Res Ctr BR, London, England
[12] Univ Med Ctr Groningen, Beatrix Childrens Hosp, Dept Pediat Pulmonol & Pediat Allergol, POB 30-001, NL-9700 RB Groningen, Netherlands