RT Journal Article SR Electronic T1 The limitations of fear messages JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 73 OP 75 DO 10.1136/tc.11.1.73 VO 11 IS 1 A1 G Hastings A1 L MacFadyen YR 2002 UL http://tobaccocontrol.bmj.com/content/11/1/73.abstract AB