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Association between incidence of CRS-1 and quartiles of the pPENK (A) and uNT-proBNP/uCr ratio (B) in ADHF patients. pPENK: plasma proenkephalin; uNT-proBNP: urine N-terminal pro-B-type natriuretic peptide; uCr: urine creatinine; CRS-1: cardiorenal syndrome type 1.
