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Schrack JA, Kuo PL, Wanigatunga AA, Di J, Simonsick EM, Spira AP, Ferrucci L, Zipunnikov V.Schrack JA, et al. Among authors: wanigatunga aa.J Gerontol A Biol Sci Med Sci. 2019 Mar 14;74(4):560-567. doi: 10.1093/gerona/gly243.J Gerontol A Biol Sci Med Sci. 2019.PMID: 30357322Free PMC article.