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Brach JS, Simonsick EM, Kritchevsky S, Yaffe K, Newman AB; Health, Aging and Body Composition Study Research Group.Brach JS, et al.J Am Geriatr Soc. 2004 Apr;52(4):502-9. doi: 10.1111/j.1532-5415.2004.52154.x.J Am Geriatr Soc. 2004.PMID: 15066063