1. 2nd Department of CardiologyMedical University of Silesia, School of Medicine with the Division of Dentistry in Zabrze Zabrze Poland
2. Faculty of Medicine and Health Sciences KielceThe Jan Kochanowski University Kielce Poland
3. Swietokrzyskie Cardiology Center Kielce Poland
4. Department of CardiologyUniversity Hospital of Pisa Pisa Italy
5. Department of CardiologyMedical University Lublin Poland