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Second trimester prenatal ultrasound for the detection of pregnancies at increased risk of Down syndrome |
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| Authors: | Rebecca Smith-Bindman Philip Chu James D. Goldberg |
| Affiliation: | 1. Department of Radiology, University of California, San Francisco, CA, USA;2. San Francisco Perinatal Associates, San Francisco, California, USA |
| Abstract: | |
| Keywords: | screening soft markers ultrasound genetic sonogram Down syndrome |