1. Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
2. Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences, Poznan, Poland
3. Department of Tumor Pathology, Greater Poland Cancer Center, Poznan, Poland
4. Department of Otolaryngology and Laryngological Oncology, Poznan University of Medical Sciences, Poznan, Poland
5. Department of Otorhinolaryngology–Head and Neck Surgery, Turku University Central Hospital and Turku University, Turku, Finland