Oral cancer incidence in Shanghai ---- a temporal trend analysis from 2003 to 2012.

BMC Cancer · 2018 · PMC6019836 · PMID 29940896

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an increasing trendno p-value reported

An increasing trend has also been observed for oropharyngeal cancers in the US, in contrast to the decreasing incidence of oral cavity cancer [ 17 ].

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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.