1. Department of Neurosurgery, Provincial Hospital, Armii Krajowej 101 Street, 43-316 Bielsko-Biała, Poland
2. Faculty of Health Sciences, University of Bielsko-Biała, Willowa 2 Street, 43-300 Bielsko-Biała, Poland
3. Department of Pathomorphology, Beskidzkie Oncology Centre, John Paul II Municipal Hospital, Wyzwolenia 18 Street, 43-300 Bielsko-Biała, Poland