DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Cicero S, Skentou C, Souka A et al.
Cervical length at 22–24 weeks of gestation: comparison of transvaginal and transperineal-translabial ultrasonography.
Ultrasound Obstet Gynecol 2001;
17: 335-340
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