DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Iams JD, Newman RB, Thom EA. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units. et al
Frequency of uterine contractions and the risk of spontaneous preterm delivery
N Engl J Med 2002; 346: 250-255
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