Change in the NT‐proBNP/Mature BNP Molar Ratio Precedes Worsening Renal Function in Patients With Acute Heart Failure: A Novel Predictor Candidate for Cardiorenal SyndromeHiroyuki Takahama, Chisato Izumi, Seiji Takashio et al.|Journal of the American Heart Association|2019Cited by 25