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Li A, Niu SP.Li A, et al. Among authors: niu sp.Zhongguo Zhen Jiu. 2022 May 12;42(5):565-8. doi: 10.13703/j.0255-2930.20210520-0007.Zhongguo Zhen Jiu. 2022.PMID: 35543950Chinese.
Gao B, Cheng Y, Zeng YL, Niu SP, Li YM, Wang Y.Gao B, et al. Among authors: niu sp.Zhongguo Zhen Jiu. 2020 Aug 12;40(8):887-90. doi: 10.13703/j.0255-2930.20191127-k0002.Zhongguo Zhen Jiu. 2020.PMID: 32869601Chinese.