1. Department of Cardiology and Angiology; Hannover Medical School; Carl-Neuberg-Strasse 1 Hannover Germany
2. Department of Cardiology, Heart, and Diabetes Centre North Rhine-Westphalia; Ruhr University Bochum; Bad Oeynhausen Germany
3. Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty; University Düsseldorf; Düsseldorf Germany
4. University of Rochester Medical Centre; Heart Research Follow up Program; Rochester NY USA