1. Centre of Experimental Medicine, Institute for Heart Research, Slovak Academy of Sciences, Bratislava, Slovakia
2. Department of Cardiac Surgery, Faculty of Medicine, National Institute of Cardiovascular Diseases, Bratislava, Slovakia
3. Department of Kinesiology and Outdoor Recreation, Southern Utah University, Cedar City, UT 84720, USA
4. Molecular Hydrogen Institute, Cedar City, UT 84720, USA