1. Department of Internal Medicine II; Division of Cardiology; Medical University of Vienna; Vienna Austria
2. Division of Endocrinology; Mayo Clinic College of Medicine; Rochester MN USA
3. Department of Cardiothoracic Surgery; University of Muenster; Muenster Germany
4. Section of Clinical Biometrics; Center for Medical Statistics, Informatics, and Intelligent Systems; Medical University of Vienna; Vienna Austria
5. Department of Medical and Chemical Laboratory Diagnostics; Medical University of Vienna; Vienna Austria