1. Department of Nephrology, Leiden University Medical Center, The Netherlands
2. Department of Clinical Epidemiology, Leiden University Medical Center, The Netherlands
3. Division of Human Nutrition, Wageningen University, The Netherlands
4. Department of Psychiatry, Leiden University Medical Center, The Netherlands
5. Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, The Netherlands
6. Department of Epidemiology, University Medical Center Groningen, The Netherlands
7. Department of Nephrology, Jeroen Bosch Hospital, The Netherlands