1. Department of Cardiology, Faculty of Health Sciences in Katowice, Medical University of Silesia in Katowice, Poland
2. Department of Propaedeutics of Nursing, Faculty of Health Sciences in Katowice, Medical University of Silesia in Katowice, Poland
3. Student Research Group at the Department of Cardiology, Faculty of Health Sciences in Katowice, Medical University of Silesia in Katowice, Poland