1. Department of Radiology, Klinikum r. d. Isar Technical University, Munich, Germany;
2. ENT-Department, Klinikum r. d. Isar Technical University, Munich, Germany;
3. Department of Medical Statistics and Epidemiology, Klinikum r.d. Isar Technical University, Munich, Germany;
4. Department of Otolaryngology, Klinikum rechts der Isar der Technischen Universitat Munchen Hals-Nasen-Ohren Klinik und Poliklinik, Munchen, Germany