RT Journal Article SR Electronic T1 Tobacco lawsuits JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 63 OP 63-a DO 10.1503/cmaj.110-2004 VO 182 IS 1 A1 Neil Collishaw YR 2010 UL http://www.cmaj.ca/content/182/1/63.2.abstract