Vitamin D status among the elderly Chinese population: a cross-sectional analysis of the 2010-2013 China national nutrition and health survey (CNNHS).

Nutr J · 2017 · PMC5237548 · PMID 28088200

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an increasing trendno p-value reported

In China, there was an increasing trend in the risk of vitamin D deficiency among pregnant women exposed to low ambient UVB levels [ 36 ].

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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.