Publication Trends in Acupuncture Research: A 20-Year Bibliometric Analysis Based on PubMed.

PLoS One · 2016 · PMC5156436 · PMID 27973611

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an increasing trendno p-value reported

When using the JIF to represent the impact of an article that was published in that year, an increasing trend over time in the average impact factors was observed. 3.6 Demographic characteristics of the clinical acupuncture studies In order to analyze demographics of populations included in clinical acupuncture studies, we used PubMed customized filter settings, and chose five age groups across the lifespan.

also in 63,971 other papers

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.