Harm reduction.
McNeill
Ann
A
St George's Hospital Medical School, London.
D006801:Humans; D009538:Nicotine / Q000008:administration & dosage; D012907:Smoking / Q000009:adverse effects*; D000074606:Smoking Prevention; D013638:Tars / Q000032:analysis; D014030:Tobacco, Smokeless
D013638:Tars; D009538:Nicotine