1. First Clinic of Internal Medicine, University Hospital of Kiel, Kiel, Germany
2. Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
3. Institute of Medical Informatics and Statistics, Christian-Albrechts-University of Kiel, Kiel, Germany
4. Institute of Epidemiology, Christian-Albrechts-University of Kiel, Kiel, Germany