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.
Li Y, Ma J, Jin Y, Li N, Zheng R, Mu W, Wang J, Si JH, Chen J, Shang HC.Li Y, et al. Among authors: shang hc.Cochrane Database Syst Rev. 2020 Feb 28;2(2):CD012670. doi: 10.1002/14651858.CD012670.pub2.Cochrane Database Syst Rev. 2020.PMID: 32108325Free PMC article.
Shang H, Chen J, Zhang J, Xiang Y, Cao H, Ren M, Wang H, Xu H, Li J, Liu D, Hu J, Wu C, Jing L, Zhang B.Shang H, et al.J Evid Based Med. 2009 May;2(2):84-91. doi: 10.1111/j.1756-5391.2009.01004.x.J Evid Based Med. 2009.PMID: 21348994Review.
Wang H, Mu W, Zhai J, Xing D, Miao S, Wang J, Deng Y, Wang N, Chen H, Yang H, He X, Shang H.Wang H, et al.Trials. 2013 Jun 5;14:165. doi: 10.1186/1745-6215-14-165.Trials. 2013.PMID: 23738508Free PMC article.Clinical Trial.
Cao H, Shang H, Mu W, Zhai J, Hou Y, Wang H.Cao H, et al.J Evid Based Med. 2013 Aug;6(3):157-66. doi: 10.1111/jebm.12053.J Evid Based Med. 2013.PMID: 24325372
Cao H, Zhai J, Mu W, Lei X, Cao H, Liu C, Shang H.Cao H, et al.Trials. 2014 Mar 19;15:84. doi: 10.1186/1745-6215-15-84.Trials. 2014.PMID: 24641790Free PMC article.Clinical Trial.