RT Journal Article SR Electronic T1 Prison smoking bans: clearing the air JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E474 OP E474 DO 10.1503/cmaj.109-4486 VO 185 IS 10 A1 Roger Collier YR 2013 UL http://www.cmaj.ca/content/185/10/E474.abstract AB