RT Journal Article SR Electronic T1 Doctors’ groups a roadblock to reform, researchers say JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E440 OP E440 DO 10.1503/cmaj.109-3271 VO 182 IS 10 A1 Lauren Vogel YR 2010 UL http://www.cmaj.ca/content/182/10/E440.abstract