1 Department of Oncology and Brachytherapy, Nicolaus Copernicus University, Ludwik Rydygier Collegium Medicum, Bydgoszcz, Poland; Department of Radiotherapy, Franciszek Lukaszczyk Oncology Centre, Bydgoszcz, Poland. Electronic address: wisniewskitomasz9@gmail.com.
2 Department of Oncology and Brachytherapy, Nicolaus Copernicus University, Ludwik Rydygier Collegium Medicum, Bydgoszcz, Poland; Department of Radiotherapy, Franciszek Lukaszczyk Oncology Centre, Bydgoszcz, Poland.
3 Department of Neurosurgery, 10th Military Research Hospital and Polyclinic, Bydgoszcz, Poland.
4 Department of Pathology, 10th Military Research Hospital and Polyclinic, Bydgoszcz, Poland.
5 Department of Oncology and Brachytherapy, Nicolaus Copernicus University, Ludwik Rydygier Collegium Medicum, Bydgoszcz, Poland.