RT Journal Article SR Electronic T1 E-cigarette data don’t end debate JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E291 OP E291 DO 10.1503/cmaj.109-5060 VO 187 IS 10 A1 Roger Collier YR 2015 UL http://www.cmaj.ca/content/187/10/E291.abstract