1. Division of Nephrology and Transplant Medicine Department of Medicine Leiden University Medical Center Leiden The Netherlands
2. Department of Rheumatology Leiden University Medical Center Leiden The Netherlands
3. Faculty of Science Department of Chemistry Crystal and Structural Chemistry Bijvoet Center for Biomolecular Research Utrecht University Utrecht The Netherlands
4. Department of Nephrology University Medical Center Groningen Groningen The Netherlands
5. Department of Immunology Leiden University Medical Center Leiden The Netherlands