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Sun Q, Lao TT, Du M, Xie M, Sun Y, Bai B, Ma J, Zhu T, Yu S, Ma R.Sun Q, et al. Among authors: lao tt.BMC Infect Dis. 2021 Mar 10;21(1):253. doi: 10.1186/s12879-021-05946-7.BMC Infect Dis. 2021.PMID: 33691634Free PMC article.
Xie M, Lao TT, Du M, Sun Q, Qu Z, Ma J, Song X, Wang M, Xu D, Ma R.Xie M, et al. Among authors: lao tt.J Obstet Gynaecol Res. 2019 Sep;45(9):1866-1875. doi: 10.1111/jog.14048. Epub 2019 Jul 1.J Obstet Gynaecol Res. 2019.PMID: 31264353
Xie M, Lao TT, Ma J, Zhu T, Liu D, Yu S, Du M, Sun Q, Ma R.Xie M, et al. Among authors: lao tt.BMC Pregnancy Childbirth. 2021 Sep 7;21(1):610. doi: 10.1186/s12884-021-04074-z.BMC Pregnancy Childbirth. 2021.PMID: 34493234Free PMC article.