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Racette SB, Weiss EP, Villareal DT, Arif H, Steger-May K, Schechtman KB, Fontana L, Klein S, Holloszy JO; Washington University School of Medicine CALERIE Group.Racette SB, et al.J Gerontol A Biol Sci Med Sci. 2006 Sep;61(9):943-50. doi: 10.1093/gerona/61.9.943.J Gerontol A Biol Sci Med Sci. 2006.PMID: 16960025Free PMC article.Clinical Trial.