Charlson comorbidity Index for descriptive risk stratification of long-term All-cause mortality in elderly patients with acute myocardial infarction: a retrospective cohort study
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By
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Fengxiang Han
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Pengyuan Zhao
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Yukun Xia
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Xiaoxu Liu
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Liting Yin
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Shuxia Liu
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Sheng Guo
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July 17, 2026