1 Department of Otorhinolaryngology, Head and Neck Surgery, Paracelsus Medical University Salzburg, Austria, Muellner Hauptstrasse 48, 5020, Salzburg, Austria. f.ferstl@salk.at.
2 Department of Internal Medicine III with Haematology, Medical Oncology, Haemostaseology, Infectiology and Rheumatology, Oncologic Center, Salzburg Cancer Research Institute - Laboratory for Immunological and Molecular Cancer Research (SCRI-LIMCR), Paracelsus Medical University Salzburg, Muellner Hauptstrasse 48, 5020, Salzburg, Austria.
3 Department of Otorhinolaryngology, Head and Neck Surgery, Paracelsus Medical University Salzburg, Austria, Muellner Hauptstrasse 48, 5020, Salzburg, Austria.