Immigration: analysis, trends and outlook on the global research activity.

J Glob Health · 2018 · PMC5908396 · PMID 29713462

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an increasing trendno p-value reported

Over the last decades, a change of the applied subject areas can be observed with an increasing trend especially in the field of Public, Environmental & Occupational Health .

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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.