1. Hospital Graz II, Academic Teaching Hospital of the Medical University of Graz, Graz, Austria, and Institute of Pathology, School of Medicine, Johannes Kepler University, Linz, Austria (S.F.L.)
2. Hospital Graz II, Academic Teaching Hospital of the Medical University of Graz, Graz, Austria (K.S., P.Z., N.K., C.K., U.B.)
3. Diagnostic & Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria (H.H.K.)
4. Institute of Hospital Hygiene and Microbiology, Styrian Hospital Corporation, Graz, Austria (K.V.)
5. Medical University of Vienna, Vienna, Austria (M.T.)