1. Department of Medical and Clinical Biochemistry Faculty of Medicine Pavol Jozef Safarik University Kosice Slovakia
2. Department of Health Psychology and Research Methodology Faculty of Medicine Pavol Jozef Safarik University Kosice Slovakia
3. Graduate School Kosice Institute for Society and Health Faculty of Medicine Pavol Jozef Safarik University Kosice Slovakia
4. 2nd Department of Internal Medicine Faculty of Medicine Pavol Jozef Safarik University Kosice Slovakia
5. Fresenius Medical Care ‐ Dialysis Services Kosice Kosice Slovakia
6. Olomouc University Social Health InstitutePalacky University Olomouc Czech Republic
7. 2nd Department of Cardiology Faculty of Medicine Pavol Jozef Safarik University and East Slovak Institute of Cardiovascular Diseases Kosice Slovakia