1. Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology/Head and Neck Surgery, Harvard Medical School, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, USA
2. Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
3. Department of Oral and Maxillofacial Surgery, Bundeswehrkrankenhaus Hamburg, Lesserstraße 180, 22049 Hamburg, Germany