RT Journal Article SR Electronic T1 Clearing the smoke: the science base for tobacco harm reduction—executive summary JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 189 OP 195 DO 10.1136/tc.10.2.189 VO 10 IS 2 A1 Kathleen Stratton A1 Padma Shetty A1 Robert Wallace A1 Stuart Bondurant YR 2001 UL http://tobaccocontrol.bmj.com/content/10/2/189.abstract AB