DOI:
10.1055/s-00028422
Ultrasound International Open
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References
Huang SY, Shaw SW, Cheuh HY. et al.
Intracardiac echogenic focus and trisomy 21 in a population previously evaluated by first-trimester combined screening.
Acta obstetricia et gynecologica Scandinavica 2010;
89: 1017-1023
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