[1] Hannover Med Sch, Dept Pulm Med, D-30625 Hannover, Germany
[2] Cent Clin Bad Berka, Dept Pneumol, Bad Berka, Germany
[3] Univ Heidelberg, Dept Clin Pharmacol, Heidelberg, Germany
[4] Hannover Med Sch, Dept Hypertens & Nephrol, D-30625 Hannover, Germany