1. Department of Electrocardiology and Heart Failure School of Health Sciences Medical University of Silesia Katowice Poland
2. Department of Electrocardiology Upper Silesian Heart Centre Katowice Poland
3. Department of Gerontology and Geriatric Nursing School of Health Sciences Medical University of Silesia Katowice Poland
4. Department of Radiology School of Health Sciences Medical University of Silesia Katowice Poland