1. Wroclaw University of Science and Technology, Wroclaw, Poland
2. Clinic of Otolaryngology and Oncological Otolaryngology with the Clinical Department of Cranio-Maxillofacial Surgery, Military Institute of Medicine – National Research Institute, Warsaw, Poland
3. Department of Otolaryngology, Medical University of Bialystok, Poland
4. Wroclaw Regional Specialist Hospital, Research & Development Centre, Wrocław, Poland
5. Wroclaw University of Science and Technology, Wroclaw, Poland, Wroclaw Regional Specialist Hospital, Research & Development Centre, Wrocław, Poland