RT Journal Article SR Electronic T1 European nations launch tax attack on unhealthy foods JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1229 OP E1230 DO 10.1503/cmaj.109-4031 VO 183 IS 17 A1 Tiago Villanueva YR 2011 UL http://www.cmaj.ca/content/183/17/E1229.abstract