[Second trimester maternal serum screening for Down's syndrome in mainland China: a multi-center prospective study].
Bian XM, Liu JT, Qi QW, Jiang YL, Li Y, Liu SY, Hao N, Zhou J, Lü SM, Zhu BS, Wang H, Xu ZF, Pan XY, Liao C, Cai Y, Wang H, Wang Z, Zhu J, Hu YL.
Bian XM, et al. Among authors: qi qw.
Zhonghua Fu Chan Ke Za Zhi. 2008 Nov;43(11):805-9.
Zhonghua Fu Chan Ke Za Zhi. 2008.
PMID: 19087560
Chinese.