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  "documentTitle": "Chinook Therapeutics Inc (KDNY)",
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      "text": "In the papers and textbooks we reviewed, nephrologists appear to agree that serum-creatinine-based measurements of GFR become less accurate as chronic kidney disease advances.",
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      "text": "estimated glomerular filtration rate (eGFR) calculated using the CKD-EPI method, which uses serum creatinine to estimate rate of toxin filtration in the kidneys, and (3) time to end-stage renal disease (ESRD).",
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