To analyse preterm birth rates worldwide to assess the incidence of this public health problem, map the regional distribution of preterm births and gain insight into existing assessment strategies.
分析全球早产率从而评估这个公共健康问题的发生率，绘制早产区域分布图并了解现有的评估战略。
To analyse preterm birth rates worldwide to assess the incidence of this public health problem, map the regional distribution of preterm births and gain insight into existing assessment strategies.
分析全球早产率从而评估这个公共健康问题的发生率，绘制早产区域分布图并了解现有的评估战略。
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