Correspondence
Research Letter
External Validation of the Berlin Equations for Estimation of GFR in the Elderly

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Acknowledgements

We thank the staff of Clinical Biochemistry and The Kent Kidney Care Centre, East Kent Hospitals University NHS Foundation Trust for cooperation and help. The study received statistical advice at the proposal stage from Drs A. Laurence and E. Bassett of the Institute of Mathematics, Statistics and Actuarial Science, University of Kent. Mr Paul Bassett (Statsconsultancy Ltd) helped with the data analysis.

Support: We acknowledge the support of the National Institute for Health Research (NIHR),

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