Array-based whole-genome survey of dog saliva DNA yields high quality SNP data.

PLoS One · 2010 · PMC2876042 · PMID 20520842

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quite significantno p-value reported

However, because saliva collection is so simple and non-invasive, it is probable that return rates would be quite significant, and likely higher than the rate of blood sample collection.

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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.