Hemoglobin level significantly impacts the tumor cell survival fraction in humans after internal radiotherapy.

EJNMMI Res · 2012 · PMC3413597 · PMID 22608186

Europe PMC DOI

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a clear trendno p-value reported

There was a clear trend towards a dose-response relationship, but the correlation was weak ( R = 0.51).

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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.