...加上PCR技术与分子杂交、SSCP、DDGGE、 RFLP及直接测序等技术的结合，大大的促进了出生 缺陷预防（Prevention of birth defects，PBD） 的研究。
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Methods the data was obtained from the birth defects surveillance system of China-US collaborate project on prevention of birth defects and disability.
方法资料来源于“中美预防出生缺陷和残疾合作项目”以人群为基础的出生缺陷监测系统。
The prevention and intervention of birth defects would be strengthened too, he said.
他还说：出生缺陷预防和干涉也要得到加强。
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