1. Department of Cardiology, Justus-Liebig-University Giessen, Medical Clinic I, Giessen, Germany
2. Department of Cardiothoracic Surgery, Medical Faculty, Goethe-University Frankfurt, Frankfurt, Germany
3. Cardioangiologisches Centrum Bethanien, Frankfurt am Main, Germany
4. Department of Cardiology, Kerckhoff-Klinik, Bad Nauheim, Germany
5. Kerckhoff Herzforschungsinstitut, Bad Nauheim, Germany