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Gardner AW, Katzel LI, Sorkin JD, Killewich LA, Ryan A, Flinn WR, Goldberg AP.Gardner AW, et al. Among authors: katzel li.J Gerontol A Biol Sci Med Sci. 2000 Oct;55(10):M570-7. doi: 10.1093/gerona/55.10.m570.J Gerontol A Biol Sci Med Sci. 2000.PMID: 11034229