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.
Xu JJ, Le QH, Sun XH, Zhang CR, Wang Y, Hong JX.Xu JJ, et al. Among authors: zhang cr.Zhonghua Yan Ke Za Zhi. 2007 Jul;43(7):583-8.Zhonghua Yan Ke Za Zhi. 2007.PMID: 17897544Chinese.
Cai RR, Wang Y, Xu JJ, Zhang CR.Cai RR, et al. Among authors: zhang cr.Zhonghua Yan Ke Za Zhi. 2011 Mar;47(3):252-9.Zhonghua Yan Ke Za Zhi. 2011.PMID: 21609628Chinese.
Niu L, Zhang C, Meng F, Cai R, Bi Y, Wang Y, Xu J.Niu L, et al.Optom Vis Sci. 2015 Jun;92(6):e126-33. doi: 10.1097/OPX.0000000000000609.Optom Vis Sci. 2015.PMID: 25969381
Huang F, Xu J, Jin H, Tan J, Zhang C.Huang F, et al.Invest Ophthalmol Vis Sci. 2015 Jun;56(6):4117-24. doi: 10.1167/iovs.14-16207.Invest Ophthalmol Vis Sci. 2015.PMID: 26114489