[1] Hannover Med Sch, Padiatr Pneumol Allergol & Neonatol, Hannover, Germany
[2] German Ctr Lung Res DZL, Biomed Res Endstage & Obstruct Lung Dis Hannover, Hannover, Germany
[3] Univ Med Ctr Schleswig Holstein, Inst Med Biometry & Stat IMBS, Lubeck, Germany
[4] German Ctr Lung Res DZL, Airway Res Ctr North ARCN, Lubeck, Germany
[5] Ludwig Maximilians Univ Munchen, Dr von Hauner Childrens Hosp, Munich, Germany
[6] German Res Ctr Environm Hlth GmbH, Inst Asthma & Allergy Prevent IAP, Munich, Germany
[7] German Ctr Lung Res DZL, Comprehens Pneumol Ctr Munich CPCM, Munich, Germany
[8] Philipps Univ Marburg, Univ Childrens Hosp Marburg, Marburg, Germany
[9] Univ Giessen, Giessen, Germany
[10] German Ctr Lung Res DZL, Marburg Lung Ctr UGMLC, Marburg, Germany
[11] Philipps Univ Marburg, Ctr Synthet Microbiol SYNMIKRO, Marburg, Germany
[12] LungenClin Grosshansdorf GmbH, Grosshansdorf, Germany
[13] Philipps Univ Marburg, Inst Lab Med & Pathobiochem, Mol Diagnost, Marburg, Germany
[14] Univ Cologne, Univ Childrens Hosp, Fac Med, Cologne, Germany
[15] Univ Med Ctr Schleswig Holstein, Div Pediat Pneumol & Allergol, Lubeck, Germany
[16] Univ Bern, Univ Childrens Hosp Bern, Dept Pediat Resp Med, Inselspital, Bern, Switzerland