1. Bremen Institute for Heart and Circulation Research (BIHKF) at the Klinikum Links der Weser , Bremen , Germany
2. Lübeck University Heart Center, Medical Clinic II , Lübeck , Germany
3. Leibniz Institute for Prevention Research and Epidemiology—BIPS , Bremen , Germany
4. Institute of Statistics, Faculty of Mathematics and Computer Science, University of Bremen , Bremen , Germany