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McElhaney JE, Meneilly GS, Beattie BL, Helgason CD, Lee SF, Devine RD, Bleackley RC.McElhaney JE, et al. Among authors: helgason cd.J Gerontol. 1992 Jan;47(1):M3-8. doi: 10.1093/geronj/47.1.m3.J Gerontol. 1992.PMID: 1730850