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.
Benchimol EI, Guttmann A, Griffiths AM, Rabeneck L, Mack DR, Brill H, Howard J, Guan J, To T.Benchimol EI, et al. Among authors: guan j.Gut. 2009 Nov;58(11):1490-7. doi: 10.1136/gut.2009.188383. Epub 2009 Aug 2.Gut. 2009.PMID: 19651626
Garvey NJ, Stukel TA, Guan J, Lu Y, Bwititi PT, Guttmann A.Garvey NJ, et al. Among authors: guan j.BMC Health Serv Res. 2014 Nov 13;14:561. doi: 10.1186/s12913-014-0561-x.BMC Health Serv Res. 2014.PMID: 25391295Free PMC article.
Saunders NR, Macpherson A, Guan J, Sheng L, Guttmann A.Saunders NR, et al. Among authors: guan j.BMC Public Health. 2017 Aug 1;18(1):73. doi: 10.1186/s12889-017-4612-1.BMC Public Health. 2017.PMID: 28764763Free PMC article.