Affiliation: | 1. Email:sesterhe@ med.uni‐marburg.de;4. Department of Otolaryngology, Head and Neck Surgery, University Hospital Giessen & Marburg, Campus Marburg, Baldingerstrasse, 35043 Marburg, Germany;5. Institute of Medical Biometry and Epidemiology, University Hospital Giessen & Marburg, Campus Marburg, Baldingerstrasse, 35043 Marburg, Germany |