Non-invasive prenatal test in 2 949 intermediate risk women after traditional Down syndrome screening

TU Xin-zhi1, DUAN Chun2, LI Yu-zhe1, YANG Xiao-min1, XIE Jian-sheng3△

Tianjin Medical Journal . 2017, (2): 180 -183 . DOI: 10.11958/20161125