title: [Is nicotine worse than heroin?].
authors.forename: Torkel
authors.initials: T
authors.lastname: Steen
mesh_terms: D001291:Attitude of Health Personnel; D006556:Heroin Dependence; D006801:Humans; D018671:Needle-Exchange Programs; D009664:Norway; D012907:Smoking; D012955:Societies, Medical