1. Department of Angiology, Faculty of Medicine, East Slovak Institute of Cardiovascular Diseases, University of Pavol Jozef Šafárik, Košice, Slovakia
2. Department of Medicine Biology, Faculty of Medicine, University of Pavol Jozef Šafárik, Košice, Slovakia
3. Department of Cardiology, Štefan Kukura Hospital, Michalovce, Slovakia
4. Department of Occupational Medicine and Clinical Toxicology, Faculty of Medicine, University of Pavol Jozef Šafárik, Košice, Slovakia
5. Department of Internal Medicine 4, Faculty of Medicine, University of Pavol Jozef Šafárik, Košice, Slovakia