1. Department of Otolaryngology, Oncology and Oral and Maxillofacial Surgery, Faculty of Health Sciences, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, Poland
2. Department of Phoniatry and Audiology, Faculty of Health Sciences, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, Poland