1. Student Scientific Circle of Heand and Neck Surgery;
Otolaryngology, Head and Neck Surgery Clinic;
4th Military Clinical Hospital, Wroclaw, Poland
2. Department of Maxillofacial Surgery, Otolaryngology, Head and Neck Surgery Clinic, 4th Military Clinical Hospital, Wroclaw, Poland
3. Department of Pathomorphology and Oncological Cytology, Faculty of Medicine, Wroclaw Medical University, Wroclaw, Poland