DOI:
10.1055/s-00028422
Ultrasound International Open
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References
Iams JD, Goldenberg RL, Meis PJ, Mercer BM, Moawad A, Das A et al.
The length of the cervix and the risk of spontaneous premature delivery. National Institute of Child Health and Human Development Maternal Fetal Medicine Unit Network.
N Engl J Med 1996;
334: 567-572
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