[1] Saarland Univ Hosp, Dept Internal Med Pulmonol Allergol Crit Care Car, Homburg, Germany
[2] Hannover Med Sch, Inst Biostat, Hannover, Germany
[3] Philipps Univ, Univ Med Ctr Giessen & Marburg, Dept Med Pulm & Crit Care Med, Marburg, Germany
[4] Hannover Med Sch, Clin Pneumol, Hannover, Germany
[5] Pulm, Grosshansdorf, Germany
[6] Airway Res Ctr North, LungenClin Grosshansdorf, Pulm Res Inst, Grosshansdorf, Germany
[7] Heidelberg Univ, Univ Hosp Heidelberg, Dept Dermatol, Heidelberg, Germany
[8] Freiburg Univ Hosp, Dept Pulmonol, Freiburg, Germany
[9] Ludwig Maximilians Univ Munchen, Inst & Outpatient Clin Occupat Social & Environm, Munich, Germany
[10] Saarland Univ, Saarland Univ Hosp, Dept Internal Med Cardiol Angiol & Intens Care Me, Homburg, Germany