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Berardi A, Haxby JV, De Carli C, Schapiro MB.Berardi A, et al.J Gerontol B Psychol Sci Soc Sci. 1997 Jan;52B(1):P54-61. doi: 10.1093/geronb/52b.1.p54.J Gerontol B Psychol Sci Soc Sci. 1997.PMID: 9008675