1. Molecular Oncology and Genetics Department , Innovative Medical Forum, The F. Lukaszczyk Oncology Center , 85-796 Bydgoszcz , Poland
2. Department of Neurosurgery , 10th Military Research Hospital and Polyclinic , 85-681 Bydgoszcz , Poland
3. Department of Neurooncology and Radiosurgery , The F. Lukaszczyk Oncology Center , 85-796 Bydgoszcz , Poland
4. Department of Oncology , Nicolaus Copernicus University in Torun, Ludwik Rydygier Collegium Medicum , 85-067 Bydgoszcz , Poland
5. Department of Oncology , Franciszek Lukaszczyk Oncology Centre , 85-796 Bydgoszcz , Poland
6. Department of Clinical Oncology, and Nursing, Departament of Oncological Surgery , Nicolaus Copernicus University in Torun, Ludwik Rydygier Collegium Medicum , 85-067 Bydgoszcz , Poland