1. Department of Cardiology J. W. Goethe University Frankfurt am Main Germany
2. Independent Public Health Care The Ministry of Internal Affairs and Administration Hospital Rzeszow Poland
3. Department of Electrocardiology Medical University of Lodz Lodz Poland
4. Heart Center Technical University Dresden Dresden Germany
5. Division of Cardiology Medical University of Graz Auenbruggerplatz 15 Graz 8036 Austria