1. Division of Facial Plastic and Reconstructive Surgery, Department of Otorhinolaryngology, University Hospital of Mannheim, Mannheim, Germany
2. Division of Facial Plastic and Reconstructive Surgery, Department of Otorhinolaryngology, University Hospital of Regensburg, Regensburg, Germany
3. Meridian Plastic Surgery Center, Indianapolis, Indiana
4. Division of Facial Plastic and Reconstructive Surgery, Department of Otorhinolaryngology, Mayo Clinic, Rochester, Minnesota