DOI:
10.1055/s-00028422
Ultrasound International Open
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References
Burger M, Weber-Rossler T, Willmann M.
Measurement of the pregnant cervix by transvaginal sonography: an interobserver study and new standards to improve the interobserver variability.
Ultrasound Obstet Gynecol 1997;
9: 188-193
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