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