Dissecting the within-Africa ancestry of populations of African descent in the Americas.

PLoS One · 2011 · PMC3017210 · PMID 21253579

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highly significantno p-value reported

We paid particular attention to the W/WC African variation, since West Africa was historically considered to be a highly significant source of slaves to North America.

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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.