Department of Otolaryngology, Head and Neck Surgery, University of Leipzig, Liebigstrasse 12, 04103, Leipzig, Germany. Susanne.wiegand@medizin.uni-leipzig.de. Department of Otolaryngology, Head and Neck Surgery, University of Leipzig, Liebigstrasse 12, 04103, Leipzig, Germany. Department of Head and Neck Surgery, Greater Poland Cancer Centre, Poznan University of Medical Sciences, PoznaĆ, Poland. Department of Otolaryngology Head and Neck Surgery, VU University Medical Center, Amsterdam, The Netherlands. Department of Otorhinolaryngology, Head and Neck Surgery, University of Giessen, Giessen, Germany.