DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Stein W, Hellmeyer L, Schmidt S et al.
Intraobserver and Interobserver Reliability of Transvaginal Cervical Length Measurements and Quantitative Ultrasound Tissue Characterization of the Cervix in the Second and Third Trimester of Pregnancy.
Ultraschall in Med 2011;
32: E169-E174
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