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Cummings JL, Doody R, Clark C.Cummings JL, et al. Among authors: doody r.Neurology. 2007 Oct 16;69(16):1622-34. doi: 10.1212/01.wnl.0000295996.54210.69.Neurology. 2007.PMID: 17938373Review.
Clark CM, Ewbank D, Lerner A, Doody R, Henderson VW, Panisset M, Morris JC, Fillenbaum GG, Heyman A.Clark CM, et al. Among authors: doody r.Neurology. 1997 Jul;49(1):70-5. doi: 10.1212/wnl.49.1.70.Neurology. 1997.PMID: 9222172