1. the Divisions of Cardiology & Angiology; Ruhr-University Bochum; Germany
2. the Divisions of Cardiac Surgery; Ruhr-University Bochum; Germany
3. the Divisions of Endocrinology and Diabetes; Ruhr-University Bochum; Germany
4. the Divisions of Institute of Pathology; Ruhr-University Bochum; Germany
5. Heart Center Bad Neustadt; Clinic for Electrophysiology; Bad Neustadt Germany