1. Department of Endocrinology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
2. Laboratory of Vascular Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
3. Department of Internal Medicine, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
4. Department of Cell Biology and Genetics, Erasmus University Medical Center, Rotterdam, the Netherlands