1. Department of Conservative Dentistry and Periodontology, Jena University Hospital, Friedrich-Schiller University, An der alten Post 4, 07743 Jena, Germany
2. Department of Otorhinolaryngology, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
3. Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 10, 07743 Jena, Germany
4. Institute of Medical Microbiology, Jena University Hospital, Friedrich-Schiller University, Erlanger Allee 101, 07747 Jena, Germany