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Illustration of the study protocol. Retrospective analysis of the association with the prognosis of heart failure (HF) with reduced ejection fraction (HFrEF) and HF with mildly reduced ejection fraction (HFmrEF) patients and simple guideline‐directed medical therapy (GDMT) score. CHF, congestive HF; HFpEF, HF with preserved ejection fraction.
