1. Department of Pediatric Otolaryngology, Centre of Postgraduate Medical Education, Dziekanów Leśny, Poland
2. Department of Pediatric Otolaryngology, Medical University of Lublin, Lublin, Poland
3. Department of Pediatric Otolaryngology, Center of Postgraduate Medical Education, Dziekanów Leśny, Poland
4. Independent Otoneurological Laboratory, Medical University of Lublin, Lublin, Poland