Residential radon and characteristics of chronic obstructive pulmonary disease.

Sci Rep · 2022 · PMC8792000 · PMID 35082364

Europe PMC DOI

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a possible trendno p-value reported

A systematic review published in 2020 reported a possible trend in this association but was unable to arrive at a definitive conclusion 30 .

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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.