Clinical and genetic features of lung squamous cell cancer in never-smokers.

Oncotarget · 2016 · PMC5094976 · PMID 27092882

Europe PMC DOI

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did not reach statistical significanceno p-value reported

This may in part be attributable to the poorer tumor differentiation in the never-smokers, though the effect did not reach statistical significance, likely due to insufficient sample size.

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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.