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To the Editor We read with interest the study by Zheng et al in which the authors conducted a meta-analysis of randomised controlled trials to evaluate the effect of different drug classes in heart failure with a preserved ejection fraction (HFpEF). Primary outcome was all-cause mortality and secondary outcome was cardiovascular mortality among other secondary outcomes. The authors found that beta-blocker therapy led to significant reductions in all-cause …
Funding This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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