Factors influencing perinatal birth defects in China： a meta-analysis
JIANG Shi-feng, ZHENG Xue-ting, ZHANG Hui-ying, LIU Ran-ran, CHENG Jin-peng.
South China Journal of Preventive Medicine . 2019, (3): 233 -236 .  DOI: 10. 13217/j. scjpm. 2019. 0233

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