1. Department of Otorhinolaryngology, Head and Neck Surgery, Klinikum Rechts der Isar, TU Munich, Munich, Germany
2. Department of Otorhinolarnygology, HNO-Zentrum Rhein-Neckar, Mannheim, Germany
3. Department of Otorhinolarnygology, Praxis für Nasenchirurgie München, Munich, Germany
4. Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center Mannheim, Mannheim, Germany