1. Faculty of Medical Sciences in Katowice, Medical University of Silesia , Medyków 18, 40-752 Katowice , Poland
2. Department of Surgical Biotechnology, Division of Surgery and Interventional Science, University College London Medical School, University College London (UCL) , London , UK
3. Department of Clinical Biochemistry, Royal Free Hospital Campus, UCL , London , UK
4. Department of Preventive Cardiology and Lipidology, Medical University of Lodz (MUL) , Rzgowska 281/289, Lodz 93-338 , Poland
5. Ciccarone Center for the Prevention of Cardiovascular Disease, Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine , 600 N. Wolfe St, Carnegie 591, Baltimore, MD 21287 , USA