1 | Clinical Department of Otorhinolaryngology and Langological Oncology, Specialistic Hospital in Zabrze |
2 | Platinum Dent, Kielce |
3 | Clinical Department of Otolaryngology, Clinical Hospital in Rzeszów |
4 | Department of Otorhinolaryngology and Oncological Laryngology, School of Medicine with the Division Dentisty in Zabrze, Medical University of Silesia in Katowice |