RT Journal Article SR Electronic T1 Unravelling the contributions of social, environmental and genetic factors to health differences JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 629 OP 630 DO 10.1503/cmaj.080669 VO 179 IS 7 A1 Bonham, Vence L. A1 Ramos, Erin M. YR 2008 UL http://www.cmaj.ca/content/179/7/629.abstract