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. 2016 Apr 22;5:722. [Version 1] doi: 10.12688/f1000research.8243.1

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Copyright: © 2016 Pantiukh KS et al.

This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The author(s) is/are employees of the US Government and therefore domestic copyright protection in USA does not apply to this work. The work may be protected under the copyright laws of other jurisdictions when used in those jurisdictions.

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Figure 3. — A and B: samples with chromosome 21 trisomic fetus. C and D: samples with normal fetus.