RT Journal Article SR Electronic T1 Chris Silagy JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 78 OP 78 DO 10.1136/tc.11.1.78 VO 11 IS 1 A1 Tim Lancaster YR 2002 UL http://tobaccocontrol.bmj.com/content/11/1/78.abstract AB