1. Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg‐Eppendorf, Hamburg, Germany
2. Department of Oral, Maxillofacial and Plastic Facial Surgery, University Hospital of Aachen University, Aachen, Germany
3. Private Practice for Oral and Maxillofacial Surgery, Aachen, Germany
4. Institute of Pathology, University Hospital, RWTH Aachen, Aachen, Germany
5. MTZ Aachen, CC&A Ltd., Aachen, Germany
6. Department of Oral and Maxillofacial Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany