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.
Chen H, Guo Y, Chen SW, Wang G, Cao HL, Chen J, Gu Y, Tian HL.Chen H, et al. Among authors: cao hl.Emerg Med Int. 2012;2012:134905. doi: 10.1155/2012/134905. Epub 2012 Dec 18.Emerg Med Int. 2012.PMID: 23320175Free PMC article.
Cui Y, Xu T, Chen J, Tian H, Cao H.Cui Y, et al. Among authors: cao h.Int J Clin Exp Med. 2015 Sep 15;8(9):15005-10. eCollection 2015.Int J Clin Exp Med. 2015.PMID: 26628984Free PMC article.
Zhao J, Xu C, Cao H, Zhang L, Wang X, Chen S.Zhao J, et al. Among authors: cao h.PeerJ. 2019 Dec 19;7:e8324. doi: 10.7717/peerj.8324. eCollection 2019.PeerJ. 2019.PMID: 31875163Free PMC article.
Chen H, Xue LX, Guo Y, Chen SW, Wang G, Cao HL, Chen J, Tian HL.Chen H, et al. Among authors: cao hl.Biomed Res Int. 2013;2013:685174. doi: 10.1155/2013/685174. Epub 2013 Aug 4.Biomed Res Int. 2013.PMID: 23984395Free PMC article.
Chen H, Xue LX, Cao HL, Chen SW, Guo Y, Gao WW, Ju SM, Tian HL.Chen H, et al. Among authors: cao hl.Biomed Res Int. 2013;2013:402375. doi: 10.1155/2013/402375. Epub 2013 Sep 8.Biomed Res Int. 2013.PMID: 24089677Free PMC article.Clinical Trial.