Serum iron status and the risk of breast cancer in the European population: a two-sample Mendelian randomisation study.

Genes Nutr · 2021 · PMC8259019 · PMID 34229617

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marginally significantno p-value reported

In addition, the causal estimates of the simple mode for the relationship between transferrin and ER-negative breast cancer were marginally significant; hence, this relationship needs to be studied further.

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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.