[Application of directed acyclic graphs in control of confounding].
Xiang R, Dai WJ, Xiong Y, Wu X, Yang YF, Wang L, Dai ZH, Li J, Liu AZ.
Xiang R, et al. Among authors: liu az.
Zhonghua Liu Xing Bing Xue Za Zhi. 2016 Jul;37(7):1035-8. doi: 10.3760/cma.j.issn.0254-6450.2016.07.025.
Zhonghua Liu Xing Bing Xue Za Zhi. 2016.
PMID: 27453119
Chinese.