1. Centre of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, 841 04 Bratislava, Slovak Republic.
2. Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, University of Manitoba, Winnipeg, MB R2H 2A6, Canada.
3. Molecular Hydrogen Institute, Enoch, Utah 84721, USA.
4. Centre of Experimental Medicine, Institute of Experimental Pharmacology and Toxicology, 841 04 Bratislava, Slovak Republic.