1. Department of Internal Medicine II, Cardiology, Pneumology, and Angiology, University Hospital Bonn, Germany
2. Institute for Medical Biometry, Informatics, and Epidemiology, University Hospital Bonn, Germany
3. Institute for Laboratory and Transfusion Medicine, Heart and Diabetes Centre North Rhine Westphalia, University Hospital of the Ruhr University Bochum, Bad Oeynhausen, Germany