1. sup>Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ulm University Medical Center, Frauensteige 12, Ulm DE 89075, Germany
2. Department of Hand, Plastic & Aesthetic Surgery, Ludwig Maximilian University of Munich, Pettenkoferstrasse 8a, Munich DE 80336, Germany
3. Department of Plastic Surgery & Hand Surgery, München rechts der Isar, Technical University of Munich, Ismaninger Str. 22, Munich DE 81675, Germany