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.
Robertson C, Nelson TA.Robertson C, et al.Int J Health Geogr. 2010 Mar 12;9:16. doi: 10.1186/1476-072X-9-16.Int J Health Geogr. 2010.PMID: 20226054Free PMC article.Review.
Robertson C, Sawford K, Daniel SL, Nelson TA, Stephen C.Robertson C, et al.Emerg Infect Dis. 2010 Oct;16(10):1524-31. doi: 10.3201/eid1610.100249.Emerg Infect Dis. 2010.PMID: 20875276Free PMC article.
Robertson C, Nelson TA, Stephen C.Robertson C, et al.Epidemiol Infect. 2012 Apr;140(4):731-43. doi: 10.1017/S0950268811001014. Epub 2011 Jun 7.Epidemiol Infect. 2012.PMID: 21676347
Vrbova L, Patrick DM, Stephen C, Robertson C, Koehoorn M, Parmley EJ, DE With NI, Galanis E.Vrbova L, et al. Among authors: robertson c.Epidemiol Infect. 2016 Jul;144(10):2165-75. doi: 10.1017/S0950268816000182.Epidemiol Infect. 2016.PMID: 27324462Free PMC article.