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Prenatal screening for Down syndrome with maternal serum human chorionic gonadotropin levels
Petrocik, Elizabeth, Wassman, E. Robert, Kelly, JoAnn C.Volume:
161
Language:
english
Journal:
American Journal of Obstetrics and Gynecology
DOI:
10.1016/0002-9378(89)90657-1
Date:
November, 1989
File:
PDF, 512 KB
english, 1989