Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi
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Zhonghua Liu Xing Bing Xue Za Zhi · Nov 2007
[Prevalence of preterm birth among singletons in 10 counties (cities) of China, 1993-2005].
To describe the secular trends and epidemiological characteristics of preterm birth among singletons in 10 counties (cities) of China during 1993-2005. ⋯ Preterm birth rate decreased steadily from 1993-2005 in 10 counties (cities) but varied by areas of the country.