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Giles L, Davies M, Whitrow M, Rumbold A, Lynch J, Sawyer M, Moore V.Giles L, et al.Ann Epidemiol. 2011 Sep;21(9):654-9. doi: 10.1016/j.annepidem.2011.04.002. Epub 2011 May 7.Ann Epidemiol. 2011.PMID: 21550818
Rumbold AR, Tan SE, Condon JR, Taylor-Thomson D, Nickels M, Tabrizi SN, Davy ML, O'Brien MM, Connors CM, Zardawi I, Stankovich J, Garland SM.Rumbold AR, et al.BMC Infect Dis. 2012 Oct 5;12:243. doi: 10.1186/1471-2334-12-243.BMC Infect Dis. 2012.PMID: 23040203Free PMC article.