1. Department of Otolaryngology, Head and Neck Surgery, Wroclaw Medical University, Wroclaw, Poland
2. Department of Microbiology, Wroclaw Medical University, Wroclaw, Poland
3. Department of Oral Anatomy, Wroclaw Medical University, Wroclaw, Poland
4. Department of Maxillofacial Surgery, Wroclaw Medical University, Wroclaw, Poland
5. Faculty of Mechanical Engineering, University of Science and Technology, Wroclaw, Poland
6. Department of Otolaryngology of Faculty of Dentistry, Wroclaw Medical University, Wroclaw, Poland