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.
Gu G, Zhang H, Fan G, He S, Meng X, Gu X, Yan N, Guan X.Gu G, et al.Eur Spine J. 2015 Aug;24(8):1640-8. doi: 10.1007/s00586-015-4031-x. Epub 2015 May 23.Eur Spine J. 2015.PMID: 26002354Clinical Trial.
Fan G, Zhang H, Gu X, Wang C, Guan X, Fan Y, He S.Fan G, et al.Medicine (Baltimore). 2017 May;96(21):e6684. doi: 10.1097/MD.0000000000006684.Medicine (Baltimore). 2017.PMID: 28538369Free PMC article.
Gu GF, Zhang HL, He SS, Gu X, Zhang LG, Ding Y, Jia JB, Zhou X.Gu GF, et al. Among authors: zhang hl, zhang lg.Zhonghua Wai Ke Za Zhi. 2011 Dec;49(12):1081-5.Zhonghua Wai Ke Za Zhi. 2011.PMID: 22333447Chinese.
Wu XB, Fan GX, Gu X, Shen TG, Guan XF, Hu AN, Zhang HL, He SS.Wu XB, et al. Among authors: zhang hl.J Zhejiang Univ Sci B. 2016 Jul;17(7):553-60. doi: 10.1631/jzus.B1600002.J Zhejiang Univ Sci B. 2016.PMID: 27381732Free PMC article.