RT Journal Article SR Electronic T1 Size does matter JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 242 OP 242 DO 10.1136/tc.8.3.e242 VO 8 IS 3 A1 SIMON CHAPMAN YR 1999 UL http://tobaccocontrol.bmj.com/content/8/3/242.6.abstract AB