1. Department of Otolaryngology, Laryngological Oncology and Maxillofacial Surgery University Hospital No. 2 Bydgoszcz Poland
2. Department of Perinatology, Gynaecology and Gynaecologic Oncology, Collegium Medicum Nicolaus Copernicus University in Bydgoszcz Bydgoszcz Poland
3. Chair of Pathology University Hospital No. 2 im. Dr. Jan Biziel in Bydgoszcz Bydgoszcz Poland
4. Department of Otolaryngology, Phoniatrics and Audiology, Collegium Medicum Nicolaus Copernicus University in Bydgoszcz Bydgoszcz Poland
5. Department of Tumor Pathology and Pathomorphology Oncology Centre‐Prof. Franciszek Łukaszczyk Memorial Hospital Bydgoszcz Poland