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Article History

First Online: 30 September 2019

Competing interests

: A.S.L. has received grants from the US National Institutes of Health (NIH) and the National Kidney Foundation (NKF) for research related to eGFR equations. J.C. has received grants from the NIH and the NKF, some of which are related to the development of eGFR equations. T.G. reports grants from the NKF and personal fees from DURECT Corporation, Janssen Pharmaceuticals and Pfizer Inc. L.A.I. reports funding awarded to Tufts Medical Center for research and contracts with the NIH, NKF, Retrophin, Omeros, Reata Pharmaceuticals and Dialysis Clinic, Inc. She also has consulting agreements with Tricida Inc. and Omeros. A.S.L., J.C. and L.A.I. have a patent pending for precise estimation of GFR using multiple biomarkers (filed 15 Aug 2014; patent number PCT/US2015/044567). Tufts Medical Center, John Hopkins University and Metabolon Inc. have a collaboration agreement to develop a product to estimate GFR from a panel of markers. H.T. declares no competing interests.