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.
Wu RY, Lu C, Xia BM, Xue WD, Tao WW, Chen G.Wu RY, et al.Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 2016 Apr;38(2):187-91. doi: 10.3881/j.issn.1000-503X.2016.02.011.Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 2016.PMID: 27181896Chinese.