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Arch Neurol. 2001;58:48.

Originally reference 9 of "Citicoline Improves Verbal Memory in Aging" by Spiers et al published in the May 1996 issue of the ARCHIVES (53:441-448) read as follows: Ladd SL, Sommer SS. Phosphatidylcholine enhances short-term memory in slow learners. Presented at the 95th annual meeting of the American Psychological Association; August 20, 1990; Boston, Mass.

It is hereby updated as follows: Ladd SL, Sommer SS, LaBerge S, Toscano W. Effect of phosphatidylcholine on explicit memory. Clin Neuropharmacol. 1993;16:540-549. Preliminary data presented at: 98th annual meeting of American Psychological Association, Clinical Neuropsychology Division; August 14, 1990; Boston, Mass.