1 Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 400, Heidelberg 69120, Germany.
2 Institute of Medical Biometry and Informatics, University Hospital Heidelberg, Im Neuenheimer Feld 130.3, Heidelberg 69120, Germany.
3 Department of Otorhinolaryngology, Head and Neck Surgery, SLK Kliniken, Am Gesundbrunnen 20-26, Heilbronn 74078, Germany.
4 Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 400, Heidelberg 69120, Germany; Department of Otorhinolaryngology, Head and Neck Surgery, SLK Kliniken, Am Gesundbrunnen 20-26, Heilbronn 74078, Germany.