Review of human-animal interactions and their impact on animal productivity and welfare.

J Anim Sci Biotechnol · 2013 · PMC3720231 · PMID 23855920

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may be significantno p-value reported

The resources required to respond to prolonged and severe stress may be significant.

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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.