DOI:
10.1055/s-00000169
American Journal of Perinatology Reports
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References
Berghella V, Tolosa JE, Kuhlman K, Weiner S, Bolognese RJ, Wapner RJ.
Cervical ultrasonography compared with manual examination as a predictor of preterm delivery.
Am J Obstet Gynecol 1997;
177 (04) 723-730
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