Overview of ongoing cohort and dietary studies in the Arctic.

Int J Circumpolar Health · 2016 · PMC5156866 · PMID 27974135

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a decreasing trendno p-value reported

Results from the three population health surveys demonstrated a decreasing trend for PCBs and pesticide levels in blood ( 54 ).

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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.