Publication on health policy worldwide from 1898 to 2013: identifying position of iran.

Mater Sociomed · 2014 · PMC4314161 · PMID 25685091

Europe PMC DOI

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an increasing trendno p-value reported

Results: Findings revealed an increasing trend of publication on health policy over past decades.

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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.