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.
Zhao Y, Mao L, Lu J, Zhang Q, Chen G, Sun M, Chang F, Li X.Zhao Y, et al. Among authors: chang f.Int J Environ Res Public Health. 2020 Nov 23;17(22):8697. doi: 10.3390/ijerph17228697.Int J Environ Res Public Health. 2020.PMID: 33238555Free PMC article.
Shi HX, Lv J, Xie YP, Wang Y, Jia JZ, Chang FS, Duan L, Sun M, Wang ZF, Hao M.Shi HX, et al.Beijing Da Xue Xue Bao Yi Xue Ban. 2010 Jun 18;42(3):264-9.Beijing Da Xue Xue Bao Yi Xue Ban. 2010.PMID: 20559398Free article.Chinese.
Li X, Shen JJ, Lu J, Wang Y, Sun M, Li C, Chang F, Hao M.Li X, et al. Among authors: chang f.BMC Health Serv Res. 2013 Dec 5;13:506. doi: 10.1186/1472-6963-13-506.BMC Health Serv Res. 2013.PMID: 24308317Free PMC article.
Zhang Y, Chen M, Lu J, Hao M, Zhang C, Sun M, Li X, Chang F.Zhang Y, et al. Among authors: chang f.Int J Health Plann Manage. 2015 Oct-Dec;30(4):330-45. doi: 10.1002/hpm.2238. Epub 2014 Jan 21.Int J Health Plann Manage. 2015.PMID: 24446091
Wang Y, Cochran C, Xu P, Shen JJ, Zeng G, Xu Y, Sun M, Li C, Li X, Chang F, Lu J, Hao M, Lu F.Wang Y, et al. Among authors: chang f.BMC Public Health. 2014 Feb 13;14:158. doi: 10.1186/1471-2458-14-158.BMC Public Health. 2014.PMID: 24520921Free PMC article.
Li X, Cochran C, Lu J, Shen J, Hao C, Wang Y, Sun M, Li C, Chang F, Hao M.Li X, et al. Among authors: chang f.Int J Health Plann Manage. 2015 Jan-Mar;30(1):E42-55. doi: 10.1002/hpm.2258. Epub 2014 Jul 2.Int J Health Plann Manage. 2015.PMID: 24986628
Liu P, Li C, Wang Y, Zeng W, Wang H, Wu H, Lu J, Sun M, Li X, Chang F, Hao M.Liu P, et al. Among authors: chang f.BMC Public Health. 2014 Nov 20;14:1193. doi: 10.1186/1471-2458-14-1193.BMC Public Health. 2014.PMID: 25413667Free PMC article.
Li C, Hou Y, Sun M, Lu J, Wang Y, Li X, Chang F, Hao M.Li C, et al. Among authors: chang f.BMC Public Health. 2015 Oct 23;15:1079. doi: 10.1186/s12889-015-2410-1.BMC Public Health. 2015.PMID: 26494015Free PMC article.