1 Department of Oncology, Collegium Medicum, University of Warmia and Mazury, Al Wojska Polskiego 37, 10-228, Olsztyn, Poland. dawid.sigorski@uwm.edu.pl.
2 Department of Oncology and Immuno-Oncology, Warmian-Masurian Cancer Center of The Ministry of The Interior and Administration's Hospital, Olsztyn, Poland. dawid.sigorski@uwm.edu.pl.
3 Department of Pathology and Neuropathology, Medical University of Gdańsk, Gdańsk, Poland.