Beyond Volume: Hospital-Based Healthcare Technology for Better Outcomes in Cerebrovascular Surgical Patients Diagnosed With Ischemic Stroke: A Population-Based Nationwide Cohort Study From 2002 to 2013.

Medicine (Baltimore) · 2016 · PMC4839903 · PMID 26986122

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may be significantno p-value reported

Second, as this is a large and longitudinal nationwide sample, there may be significant heterogeneity in the care provided both in the field and at receiving hospitals.

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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.