Cite
HARVARD Citation
Wald, N. et al. (1992). First trimester concentrations of pregnancy associated plasma protein A and placental protein 14 in Down's syndrome.. BMJ. 305 (6844), p. 28. [Online].
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Wald, N. et al. (1992). First trimester concentrations of pregnancy associated plasma protein A and placental protein 14 in Down's syndrome.. BMJ. 305 (6844), p. 28. [Online].