1. Heart Center Bad Neustadt, Clinic for Interventional Electrophysiology, Bochum, Germany
2. Cardiac Arrhythmia Service, Medical Faculty, Division of Cardiology, Pulmonology, and Vascular Medicine, Heinrich-Heine University Hospital Duesseldorf, University Düsseldorf, Düsseldorf, Germany
3. Department of Endocrinology and Diabetes, Ruhr-University Bochum, Bochum, Germany
4. Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany