The Prevalence of Root Sensitivity following Periodontal Therapy: A Systematic Review.

Int J Dent · 2012 · PMC3501835 · PMID 23193405

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may be significantno p-value reported

This omission may be significant if the age variable is a factor for the reported differences of DH between studies.

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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.