Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387 Krakow, Poland. Department of Coronary Disease and Heart Failure, John Paul II Hospital, 31-202 Krakow, Poland. Department of Coronary Disease and Heart Failure, Jagiellonian University Medical College, John Paul II Hospital, 31-202 Krakow, Poland.