1. 2nd Department of Cardiology; Swietokrzyskie Cardiology Center; Kielce Poland
2. Department of Health Sciences; Jan Kochanowski University; Kielce Poland
3. 2nd Department of Cardiology; Silesian Medical University; Zabrze Poland
4. Department of Biology; Jan Kochanowski University; Kielce Poland
5. Department of Cardiology; Medical University; Lublin Poland