[1] Univ Klinikum Frankfurt, Med Klin 1, Pneumol Allergol, Frankfurt, Germany
[2] Hannover Med Sch, Inst Pathol, Hannover, Germany
[3] German Ctr Lung Res Dzl, Biomed Res Endstage & Obstruct Lung Dis Hannover, Hannover, Germany
[4] Univ Klinikum Frankfurt, Inst Med Mikrobiol & Krankenhaushyg, Frankfurt, Germany