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.
Bi X, Xie H, Zheng H, Ding S, Zhang S, Wang Y, Xu Z, Ren D.Bi X, et al.Chin Med J (Engl). 2002 Nov;115(11):1628-31.Chin Med J (Engl). 2002.PMID: 12609075
Zhao XP, Zheng HM, Xie HJ, Ding SJ, Ren DM.Zhao XP, et al. Among authors: zheng hm.Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2004 Aug;21(4):339-41.Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2004.PMID: 15300629Chinese.