[1] Philipps Univ Marburg, Univ Giessen & Marburg Lung Ctr UGMLC, German Ctr Lung Res DZL, Inst Lab Med, Marburg, Germany
[2] Natl & Kapodistrian Univ Athens, Evangelismos Gen Hosp, Dept Crit Care Med & Pulm Serv 1, Athens 11527, Greece
[3] German Res Ctr Environm Hlth GmbH, Helmholtz Zentrum Munich, Inst Asthma & Allergy Prevent IAP, Munich, Germany
[4] European Soc Clin Microbiol & Infect Dis ESCMID, Study Grp Resp Viruses ESGREV, Basel, Switzerland
[5] Aghia Sophia Childrens Hosp, Dept Pediat 2, Athens, Greece
[6] Hippokrateion Hosp, Dept Gastroenterol, Athens, Greece