About the Authors

Paul Y. Boxma

Contributed equally to this work with: Paul Y. Boxma, Else van den Berg

Affiliation Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands

Else van den Berg

Contributed equally to this work with: Paul Y. Boxma, Else van den Berg

Affiliations Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands, Top Institute Food and Nutrition, Wageningen, The Netherlands

Johanna M. Geleijnse

Affiliation Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands

Gozewijn D. Laverman

Affiliation Department of Internal Medicine, Division of Nephrology, ZGT Hospital Almelo, Almelo, The Netherlands

Leon J. Schurgers

Affiliation Department of Biochemistry, Maastricht University, Maastricht, The Netherlands

Cees Vermeer

Affiliation VitaK, Maastricht University, Maastricht, The Netherlands

Ido P. Kema

Affiliation Department of Laboratory Medicine, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands

Frits A. Muskiet

Affiliation Department of Laboratory Medicine, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands

Gerjan Navis

Affiliation Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands

Stephan J. L. Bakker

Affiliations Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands, Top Institute Food and Nutrition, Wageningen, The Netherlands

Martin H. de Borst

m.h.de.borst@umcg.nl

Affiliation Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands

Competing Interests

Cees Vermeer is CEO of Vitak B.V. The other authors have declared that no competing interests exist. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: PYB EvdB GN SJLB MHdB. Performed the experiments: PYB EvdB MHdB. Analyzed the data: PYB EvdB MHdB. Contributed reagents/materials/analysis tools: JMG LS CV. Wrote the paper: PYB EvdB GDL IPK FAM GN SJLB MHdB.