1 Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Innsbruck, Anichstr.35, 6020, Innsbruck, Austria.
2 Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Innsbruck, Anichstr.35, 6020, Innsbruck, Austria. birte.bender@tirol-kliniken.at.
3 Department of Pediatrics I, Medical University Innsbruck, 6020, Innsbruck, Austria.