DOI:
10.1055/s-00000009
American Journal of Perinatology
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References
Owen J, Yost N, Berghella V. , et al; National Institute of Child Health and Human Development, Maternal-Fetal Medicine Units Network.
Mid-trimester endovaginal sonography in women at high risk for spontaneous preterm birth.
JAMA 2001;
286 (11) 1340-1348
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