RT Journal Article SR Electronic T1 Possible causes of cognitive decline JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 431 OP 432 DO 10.1503/cmaj.1041166 VO 171 IS 5 A1 Michael D. Hill A1 Jessica E. Simon YR 2004 UL http://www.cmaj.ca/content/171/5/431.abstract