RT Journal Article SR Electronic T1 Do mobile phones replace cigarette smoking among teenagers? JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 339 OP 340 DO 10.1136/tc.12.3.339-a VO 12 IS 3 A1 N Steggles A1 M J Jarvis YR 2003 UL http://tobaccocontrol.bmj.com/content/12/3/339.2.abstract AB