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Martens PJ, Bartlett JG, Prior HJ, Sanguins J, Burchill CA, Burland EM, Carter S.Martens PJ, et al. Among authors: bartlett jg.BMC Public Health. 2011 Oct 19;11:814. doi: 10.1186/1471-2458-11-814.BMC Public Health. 2011.PMID: 22011510Free PMC article.