RT Journal Article SR Electronic T1 Smoking or health in the '80s? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1077 OP 1078 VO 125 IS 10 A1 M. J. Ashley A1 W. F. Forbes A1 R. C. Frecker YR 1981 UL http://www.cmaj.ca/content/125/10/1077.abstract