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- [2] American Institute of Ultrasound in Medicine, 2013, J Ultrasound Med, V32, P1083, DOI 10.7863/ultra.32.6.1083
- [4] Prevalence, Risk Factors and Outcomes of Velamentous and Marginal Cord Insertions: A Population-Based Study of 634,741 Pregnancies [J]. PLOS ONE, 2013, 8 (07):