1. Department of Medical Physics and Biophysics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Krakow, Poland;
2. Department of Neuroanatomy, Institute of Zoology and Biomedical Research, Jagiellonian University, Krakow, Poland;
3. Institute of Physics, Jan Kochanowski University, Kielce, Poland;
4. Holly Cross Center, Kielce, Poland