1. Institute of Physics; Jan Kochanowski University; Świȩtokrzyska 15 25-406 Kielce Poland
2. Holycross Cancer Center; Artwińskiego 3 25-734 Kielce Poland
3. Institute of Public Health; Jan Kochanowski University; IX Wieków Kielc 19 25-317 Kielce Poland