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1 Reference values for the cervical length measurement in the second trimester of pregnancy using the transvaginal ultrasound in a large Brazilian population
Alberto Borges Peixoto, Taciana Mara Rodrigues da Cunha Caldas, Ana Helena Bittencourt Alamy, Wellington P. Martins, Rafael Frederico Bruns, Edward Araujo Júnior
Obstet Gynecol Sci.2016;59(4):303-306.   Published online 2016 July 13     DOI: http://dx.doi.org/10.5468/ogs.2016.59.4.303
      

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