Effect of obstetric difficulties and maternal disease on premature infant mortality.
TAYLOR
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ES
PHALEN
J R
JR
DYER
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HL
D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D061213:Mortality, Premature; D011247:Pregnancy