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Odden MC, Shlipak MG, Tager IB.Odden MC, et al.J Gerontol A Biol Sci Med Sci. 2009 Mar;64(3):370-6. doi: 10.1093/gerona/gln037. Epub 2009 Jan 30.J Gerontol A Biol Sci Med Sci. 2009.PMID: 19181716Free PMC article.