DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Hertzberg BS. Bowie JD. Weber TM. et al.
Sonography of the cervix during the third trimester of pregnancy: value of the transperineal approach.
Am J Roentgenol 1991;
157: 73-76
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