Serial plasma levels of angiogenic factors in patients with ST-segment elevation myocardial infarction undergoing primary percutaneous coronary intervention.

Korean Circ J · 2012 · PMC3409395 · PMID 22870080

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showed a trendno p-value reported

14) However, against our expectation, the patient group with collateral grade 0/1 had higher LV ejection fractions and showed a trend toward lower Killip class compared to the patient group with collateral grade 2/3.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.