1. Department of Cardiology; University Medical Center Groningen; Groningen The Netherlands
2. Department of Laboratory Medicine; Radboud University Medical Center; Nijmegen The Netherlands
3. Department of Nephrology; University Medical Center Groningen; Groningen The Netherlands
4. Department of Laboratory Medicine; University Medical Center Groningen; Groningen The Netherlands
5. Yong Loo Lin School of Medicine; National University of Singapore; Singapore