1. Department of Oromaxillofacial Surgery, University of Greifswald, Greifswald, Germany
2. Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
3. Skin and Face Clinic, Baden-Baden, Germany
4. Department of Otorhinolaryngology, Ruprecht-Karls-Universität Heidelberg, Medical Faculty at Mannheim, Mannheim, Germany
5. Department of Otorhinolaryngology, Head and Neck Surgery, Facial Plastic Surgery, Klinikum Karlsruhe, Karlsruhe, Germany