Effectiveness of quadrivalent human papillomavirus vaccine for the prevention of cervical abnormalities: case-control study nested within a population based screening programme in Australia.

BMJ · 2014 · PMC3942076 · PMID 24594809

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did not reach statistical significanceno p-value reported

Effectiveness of two doses did not reach statistical significance.

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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.