1. Department of Orthodontics University Hospital of Bonn Bonn Germany
2. Department of Natural Sciences, Immunology and Cell Biology University of Applied Sciences Bonn‐Rhein‐Sieg Rheinbach Germany
3. Oral Technology University of Bonn Bonn Germany
4. Institute for Medical Microbiology, Immunology, and Parasitology University Hospital of Bonn Bonn Germany
5. Department for Oral and Craniomaxillofacial Plastic Surgery University of Cologne Cologne Germany