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Costa E, Barreto SM, Uchoa E, Firmo JO, Lima-Costa MF, Prince M.Costa E, et al.Int Psychogeriatr. 2006 Sep;18(3):493-503. doi: 10.1017/S1041610205002954. Epub 2006 Feb 15.Int Psychogeriatr. 2006.PMID: 16478572