1. Department of Epidemiology and Biostatistics; EMGO Institute for Health and Care Research; VU University Medical Centre; Amsterdam the Netherlands
2. Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz Austria
3. Metabolic Laboratory; Department of Clinical Chemistry and Institute for Cardiovascular Research (ICaR-VU); VU University Medical Center; Amsterdam the Netherlands
4. Clinical Institute of Medical and Chemical Laboratory Diagnostics; Medical University of Graz; Graz Austria
5. Division of Cardiology; Department of Internal Medicine; Medical University of Graz; Graz Austria
6. Division of Nephrology; Department of Medicine; University of Würzburg; Würzburg Germany
7. Department of General Practice and the EMGO Institute for Health and Care Research; VU University Medical Centre; Amsterdam the Netherlands
8. Department of Internal Medicine and Cardiovascular Research Institute Maastricht; Maastricht University Medical Centre; Maastricht the Netherlands
9. Department of Medicine V (Nephrology, Hypertensiology, Endocrinlogy, Diabetology, Rheumatology); Medical Faculty Mannheim; University of Heidelberg; Mannheim Germany
10. Synlab Academy; Synlab Services GmbH; Mannheim Germany