The children were born between 1997 and 2003 and were participants in the National Birth Defects Prevention Study, which drew data from 10 birth-defect surveillance systems in 10 states.
这些孩子在1997-2003年之间出生,并且参加了国家出生缺陷预防研究,这项研究从10个州的10个出生缺陷监测系统中提取数据。
The children were born between 1997 and 2003 and were participants in the National Birth Defects Prevention Study, which drew data from 10 birth-defect surveillance systems in 10 states.
这些孩子在1997-2003年之间出生,并且参加了国家出生缺陷预防研究,这项研究从10个州的10个出生缺陷监测系统中提取数据。
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