[1] Univ Hosp Regensburg, Dept Hosp Hyg & Infect Dis, Franz Josef Str Allee 11, D-93053 Regensburg, Germany
[2] Univ Hosp Regensburg, Ctr Clin Studies, Franz Josef Str Allee 11, D-93053 Regensburg, Germany
[3] Univ Hosp Regensburg, Inst Clin Microbiol & Hyg, Franz Josef Str Allee 11, D-93053 Regensburg, Germany
[4] Donaustauf Hosp, Ctr Pneumol, Ludwigstr 68, D-93093 Donaustauf, Germany