PMC:6640909 / 7935-7961 JSONTXT

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{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/6640909","sourcedb":"PMC","sourceid":"6640909","source_url":"https://www.ncbi.nlm.nih.gov/pmc/6640909","text":"Ejection fraction ≤25% and","tracks":[]}