PT - JOURNAL ARTICLE ED - , TI - Periodic health examination, 1991 update: 1. Screening for cognitive impairment in the elderly. Canadian Task Force on the Periodic Health Examination DP - 1991 Feb 15 TA - Canadian Medical Association Journal PG - 425--431 VI - 144 IP - 4 4099 - http://www.cmaj.ca/content/144/4/425.short 4100 - http://www.cmaj.ca/content/144/4/425.full SO - CMAJ1991 Feb 15; 144