1. Department of Internal Medicine and Oncological Chemotherapy, Silesian Medical University, Katowice 40‑027, Poland
2. Department of Biochemistry, Silesian Medical University, Katowice 40‑752, Poland
3. Clinical and Experimental Oncology Department, Maria Skłodowska‑Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice 44‑101, Japan
4. First Department of Cardiology, School of Medicine in Katowice, Medical University of Silesia, Katowice 40‑635, Poland