1. Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands;
2. Department of Internal Medicine, Maastricht University Medical Centre, Maastricht, The Netherlands;
3. Department of Clinical Epidemiology and Medical Technology Assessment, School for Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands;
4. Department of Internal Medicine, Flevoziekenhuis, Almere, The Netherlands;
5. Department of Internal Medicine, Academic Medical Center Amsterdam, Amsterdam, The Netherlands;
6. Department of Hematology, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands;
7. Department of Internal Medicine, Maxima Medical Center Eindhoven, Eindhoven, The Netherlands;
8. Department of Internal Medicine, Zuyderland Medical Centre, Heerlen, The Netherlands;
9. Department of Internal Medicine, Laurentius Hospital, Roermond, The Netherlands;
10. Department of Internal Medicine, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands;
11. Department of Internal Medicine, Medical Center Slotervaart, Amsterdam, The Netherlands; and
12. Department of Internal Medicine, University Medical Centre Nijmegen, Nijmegen, The Netherlands