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[Epidemiologic survey on the prevalence and distribution of childhood functional constipation in the northern areas of China: a population-based study].
Zhang SC, Wang WL, Qu RB, Su PJ, Zhang SW, Zhang HR, Tan SY, Chen XJ, Zhang W, Ai DB, Wu HT, Gong LC, Wang JL, He Y, Wan C, Dong GH. Zhang SC, et al. Among authors: zhang sw, zhang hr, zhang w. Zhonghua Liu Xing Bing Xue Za Zhi. 2010 Jul;31(7):751-4. Zhonghua Liu Xing Bing Xue Za Zhi. 2010. PMID: 21162836 Chinese.
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