A multidimensional framework for rating health system performance and sustainability: A nine plus one ranking system.

J Glob Health · 2021 · PMC8109277 · PMID 34026052

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may be significantno p-value reported

This estimated surgical procedure need by regions and not by countries can lead to bias, since there may be significant differences between countries within a same region.

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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.