RT Journal Article SR Electronic T1 Ideology trumps evidence with new voluntary survey JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E541 OP E541 DO 10.1503/cmaj.100976 VO 182 IS 12 A1 Marsha Cohen A1 Paul C. Hébert YR 2010 UL http://www.cmaj.ca/content/182/12/E541.abstract