1. Department of Oto-Rhino-Laryngology, Plastic, Aesthetic, and Reconstructive Head and Neck Surgery; Comprehensive Hearing Center, University of Wuerzburg, Josef-Schneider-Straße 11; 97080 Wuerzburg Germany
2. Department of Oto-Rhino-Laryngology, Head and Neck Surgery; Carl von Ossietzky-University; Oldenburg Germany