1. From the Clinical Department of Cardioanesthesia and Intensive Care Unit (Trejnowska, Knapik) and the Department of Histopathology (Nożyński, Lange), Silesian Centre for Heart Diseases, Zabrze, Poland
2. Faculty of Medical Sciences in Zabrze (Trejnowska, Knapik), Medical University of Silesia, Katowice, Poland
3. the Department of Anaesthesiology and Intensive Therapy, Central Clinical Hospital of the Ministry of Interior and Administration, Warsaw, Poland (Jankowski)
4. Institute of Cardiology, Jagiellonian University Medical College, Kraków, Poland (Jankowski)
5. the Department of Epidemiology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland (Brożek)
6. the Department of Lung Diseases and Tuberculosis, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, Katowice, Poland (Skoczyński)
7. Faculty of Science and Technology, University of Silesia, Katowice, Poland (Swinarew)
8. Institute of Sport Science, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland (Swinarew); and the Department of Pathology, Faculty of Medicine, Academia of Silesia, Katowice, Poland (Lange)