1. Department of Family Medicine, Chair of Internal Medicine and Gerontology, Jagiellonian University Medical College, Krakow, Poland.
2. Department of Public Health, University of Technology, Czestochowa, Poland.
3. Silesian Analytical Laboratories, Katowice, Poland.
4. Academic Group of Primary Medical Care, University of Sheffield, Sheffield, UK.
5. Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.
6. Department of Internal Medicine II, University of Regensburg, Regensburg, Germany.
7. Department of Hypertension, Vascular Diseases, and Internal Diseases, University of Medical Sciences, Poznan, Poland.
8. Department of Coronary Disease, Jagiellonian University Medical College, Krakow, Poland.
9. Department of Internal Diseases, Diabetology and Nephrology, Medical University of Silesia, Katowice, Poland.