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.
Gao Y, Den J, Xiang Y, Ruan Z, Wang Z, Hu B, Guo M, Teng W, Han J, Zhang Y.Gao Y, et al.Zhonghua Yu Fang Yi Xue Za Zhi. 1999 Jan;33(1):5-8.Zhonghua Yu Fang Yi Xue Za Zhi. 1999.PMID: 11864445Chinese.
Xiang Y, Gao Y, Zhong L, Jin F, Sun L, Cheng J, Zhai Y.Xiang Y, et al.Zhonghua Yu Fang Yi Xue Za Zhi. 1999 Jan;33(1):9-12.Zhonghua Yu Fang Yi Xue Za Zhi. 1999.PMID: 11864446Chinese.
Zhang X, Shu XO, Yang G, Li HL, Xiang YB, Gao YT, Li Q, Zheng W.Zhang X, et al. Among authors: xiang yb.Am J Epidemiol. 2005 Feb 1;161(3):213-8. doi: 10.1093/aje/kwi028.Am J Epidemiol. 2005.PMID: 15671253