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Second-trimester alpha-fetoprotein and beta-human chorionic gonadotrophin prenatal screening using dried blood spots on filter paper for Down's syndrome
Chinese Journal of Reproductive Health ›› 2005, Vol. 16 ›› Issue (6) : 337-340.
Second-trimester alpha-fetoprotein and beta-human chorionic gonadotrophin prenatal screening using dried blood spots on filter paper for Down's syndrome
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