| Cost-benefit analysis of targeted ultrasonography for prenataldetection of spina bifida in patients with an elevated concentration ofsecond-trimester maternal serum @a-fetoprotein |
Vintzileos, A.M.;Ananth, C.V.;Fisher, A.J.;Smulian, J.C.;Day-Salvatore, D.;Beazoglou, T.;Knuppel, R.A.; |
American Journal of Obstetrics and Gynecology |
1999-05-01 |
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