1. Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
2. Medical Faculty, Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz, Austria
3. Institute of Laboratory Medicine, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
4. Institute for Pathology and Microbiology, Kepler University Hospital GmbH, Krankenhausstrasse 9, 4020 Linz, Austria
5. Center for Clinical Studies (CCS Linz), Johannes Kepler University Linz, Krankenhausstrasse 5, 4040 Linz, Austria