An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Shi YX, Zhang XS, Liu DG, Li YQ, Guan ZZ, Jiang WQ.Shi YX, et al. Among authors: guan zz.Ai Zheng. 2004 May;23(5):597-601.Ai Zheng. 2004.PMID: 15142463Chinese.
Sun XF, Su YS, Liu DG, Jiang WQ, He YJ, Lin TY, Huang HQ, Zhang L, Xia ZJ, Li YH, Zhou ZM, Chen XQ, Xia Y, Zhen ZJ, Guan ZZ.Sun XF, et al. Among authors: guan zz.Ai Zheng. 2004 Aug;23(8):933-8.Ai Zheng. 2004.PMID: 15301718Chinese.
Peng YL, Huang HQ, Lin XB, Xia ZJ, Li YH, Wang W, He YJ, Pan ZH, Jiang WQ, Guan ZZ.Peng YL, et al. Among authors: guan zz.Ai Zheng. 2004 Aug;23(8):943-6.Ai Zheng. 2004.PMID: 15301720Chinese.