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Zhao Y, Tong Z, Xu L, Zhao H, Hou X.Zhao Y, et al. Among authors: xu l.Zhonghua Jie He He Hu Xi Za Zhi. 1999 Feb;22(2):101-3.Zhonghua Jie He He Hu Xi Za Zhi. 1999.PMID: 11820952Chinese.
Chen X, Xu B, Guo J, Li C, An S, Zhou Y, Chen A, Deng L, Fu Z, Zhu Y, Liu C, Xu L, Wang W, Shen K, Xie Z.Chen X, et al. Among authors: xu l, xu b.Sci Rep. 2018 Mar 14;8(1):4491. doi: 10.1038/s41598-018-22826-4.Sci Rep. 2018.PMID: 29540836Free PMC article.
Xu L, Liu J, Liu C, Duan Y, Zhu Y, Xu B, Xie Z.Xu L, et al. Among authors: xu b.BMC Infect Dis. 2018 Dec 7;18(1):634. doi: 10.1186/s12879-018-3520-z.BMC Infect Dis. 2018.PMID: 30526511Free PMC article.