TY - JOUR T1 - Periodic health examination, 1991 update: 1. Screening for cognitive impairment in the elderly. Canadian Task Force on the Periodic Health Examination JF - Canadian Medical Association Journal JO - CMAJ SP - 425 LP - 431 VL - 144 IS - 4 A2 - , Y1 - 1991/02/15 UR - http://www.cmaj.ca/content/144/4/425.abstract ER -