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Yang Y, Schonnop R, Feldman F, Robinovitch SN.Yang Y, et al. Among authors: feldman f.BMC Geriatr. 2013 May 1;13:40. doi: 10.1186/1471-2318-13-40.BMC Geriatr. 2013.PMID: 23635343Free PMC article.Clinical Trial.
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