1. Center for Sports Cardiology at the Gajda-Med Medical Center in Pułtusk; ul. Piotra Skargi 23/29 06-100 Pułtusk Poland
2. The Cardinal Stefan Wyszyński Institute of Cardiology; ul. Alpejska 42 04-628 Warszawa Poland
3. Department of Preventive Medicine; Faculty of Health; Medical University of Lodz; ul. Lucjana Żeligowskiego 7/9 90-752 Łódź Poland