Somatosensory abnormalities for painful and innocuous stimuli at the back and at a site distinct from the region of pain in chronic back pain patients.

PLoS One · 2013 · PMC3598908 · PMID 23554950

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highly significantno p-value reported

Specifically, we found highly significant increases in pain rating especially to slight and moderate pin prick stimuli [13] .

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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.