1. Institute for Infection Medicine Christian‐Albrecht University of Kiel and University Medical Center Schleswig‐Holstein Kiel Germany
2. Department of Periodontology Operative and Preventive Dentistry Center for Dental Medicine, University of Bonn Bonn Germany
3. Section of Experimental Virology Institute for Medical Microbiology Friedrich‐Schiller University of Jena and University Hospital Jena Jena Germany