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.
Zhang Z, Qu Y, Zhang B, Nie L, Soon G.Zhang Z, et al. Among authors: zhang b.Stat Methods Med Res. 2016 Oct;25(5):2103-2119. doi: 10.1177/0962280213515572. Epub 2013 Dec 16.Stat Methods Med Res. 2016.PMID: 24346166
Liu C, Liu A, Zhang B, Zhang Z.Liu C, et al. Among authors: zhang b, zhang z.Front Public Health. 2013 Oct 7;1:39. doi: 10.3389/fpubh.2013.00039. eCollection 2013.Front Public Health. 2013.PMID: 24350208Free PMC article.
Zhang H, He H, Lu N, Zhu L, Zhang B, Zhang Z, Tang L.Zhang H, et al. Among authors: zhang b, zhang z.Stat Methods Med Res. 2017 Jun;26(3):1461-1475. doi: 10.1177/0962280215583397. Epub 2015 May 5.Stat Methods Med Res. 2017.PMID: 25944850
Zhang B, Liu W, Zhang Z, Qu Y, Chen Z, Albert PS.Zhang B, et al. Among authors: zhang z.Stat Methods Med Res. 2017 Aug;26(4):1881-1895. doi: 10.1177/0962280215592268. Epub 2015 Jun 24.Stat Methods Med Res. 2017.PMID: 26113386