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Mainous AG 3rd, Majeed A, Koopman RJ, Baker R, Everett CJ, Tilley BC, Diaz VA.Mainous AG 3rd, et al. Among authors: koopman rj.Public Health Rep. 2006 Jan-Feb;121(1):60-6. doi: 10.1177/003335490612100112.Public Health Rep. 2006.PMID: 16416699Free PMC article.