Exposure to persistent organic pollutants and thyroid cancer risk: a study protocol of systematic review and meta-analysis.

BMJ Open · 2021 · PMC8375755 · PMID 34408050

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possibly significantno p-value reported

The main possible limitations of this study are a limited number of eligible studies and possibly significant heterogeneity between studies.

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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.