Prevalence and risk factors of Human Papillomavirus (HPV) infection in southern Chinese women - a population-based study.

PLoS One · 2011 · PMC3086888 · PMID 21559276

Europe PMC DOI

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did not reach statistical significanceno p-value reported

Having previous sexually transmitted disease (STD) and being smoker tended to have increase of HPV infection risk, however they 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.