RT Journal Article SR Electronic T1 Health disparities grow as people live longer JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1232 OP 1233 DO 10.1503/cmaj.090770 VO 180 IS 12 A1 A. Mark Clarfield YR 2009 UL http://www.cmaj.ca/content/180/12/1232.abstract