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Wei YJ, Simoni-Wastila L, Lucas JA, Brandt N.Wei YJ, et al.J Gerontol A Biol Sci Med Sci. 2017 May 1;72(5):695-702. doi: 10.1093/gerona/glw095.J Gerontol A Biol Sci Med Sci. 2017.PMID: 27247274Free PMC article.