1. Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany
2. Institute of Immunology, Centre for Biomedical Education and Research (ZBAF), School of Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
3. Institute of Virology and Microbiology, Centre for Biomedical Education and Research (ZBAF), School of Human Medicine, Faculty of Health, Witten/Herdecke University, Witten, Germany
4. Fraunhofer Institute for Interfacial Engineering and Biotechnology, Stuttgart, Germany
5. Institute for Interfacial Engineering and Plasma Technology IGVP, University of Stuttgart, Stuttgart, Germany