1. Department of Neurological Rehabilitation, Voivodeship Specialist Hospital in Olsztyn, Poland
2. Department of Otorhinolaryngology, Head and Neck Diseases, School of Medicine, Collegium Medicum, University of Warmia and Mazury, Olsztyn, Poland
3. Clinic of Otorhinolaryngology, Head and Neck Diseases, University Hospital, Olsztyn, Poland
4. Faculty of Medicine, Academy of Applied Medical and Social Science in Elbląg, Poland