| Prenatal maternal dried blood screening with @a-fetoprotein and free@b-human chorionic gonadotropin for open neural tube defect and Downsyndrome |
Macri, J.N.;Anderson, R.W.;Krantz, D.A.;Larsen, J.W.;Buchanan, P.D.; |
American Journal of Obstetrics and Gynecology |
1996-02-01 |
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