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American Journal of Obstetrics and Gynecology|September 1, 1989
Routine umbilical cord blood gas determinations?J A Thorp, J E Sampson, V M Parisi, et al.
American Journal of Obstetrics and Gynecology|January 1, 1997
Fetal origin of amniotic fluid polymorphonuclear leukocytesJ E Sampson, R P Theve, R N Blatman, et al.
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