1. Division of Nephrology; Department of Internal Medicine; University Medical Center Groningen and University of Groningen; Groningen the Netherlands
2. Division of Nephrology; Department of Internal Medicine; Leiden University Medical Center and Leiden University; Leiden the Netherlands
3. Department of Endocrinology; University Medical Center Groningen and University of Groningen; Groningen the Netherlands
4. Topinstituut Food and Nutrition; Wageningen the Netherlands
5. Groningen University Institute for Drug Exploration; Groningen the Netherlands