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Khalil Z, Merhi M, Livett BG.Khalil Z, et al. Among authors: livett bg.J Gerontol A Biol Sci Med Sci. 2001 Aug;56(8):B356-63. doi: 10.1093/gerona/56.8.b356.J Gerontol A Biol Sci Med Sci. 2001.PMID: 11487594
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