RT Journal Article SR Electronic T1 Trends in physicians' giving advice to stop smoking, United States, 1974-87 JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 31 DO 10.1136/tc.1.1.31 VO 1 IS 1 A1 E. Gilpin A1 J. Pierce A1 J. Goodman A1 G. Giovino A1 C. Berry A1 D. Burns YR 1992 UL http://tobaccocontrol.bmj.com/content/1/1/31.abstract AB