1. Department of Otorhinolaryngology, University Medical Center Hamburg–Eppendorf, Martinistr. 52, Hamburg 20246, Germany
2. Institute of Radiology, Charité–Universitätsmedizin Berlin, corporate member of Freie Universität, Berlin Humboldt Universität zu Berlin and Berlin Institute of Health, Campus Charité Mitte, Chariteplatz 1, Berlin 10117, Germany
3. Department of Otorhinolaryngology, Head and Neck Surgery, Charité–Universitätsmedizin Berlin, corporate member of Freie Universität, Berlin Humboldt Universität zu Berlin and Berlin Institute of Health, Campus Charité Mitte, Charitéplatz 1, Berlin 10117, Germany