title: Comments on Sells' paper: "Reflections on the Epidemiology of Heroin and Narcotic Addiction from the Perspective of Treatment Data".
mesh_terms: D004812:Epidemiologic Methods; D006556:Heroin Dependence / Q000453:epidemiology* / Q000523:psychology / Q000534:rehabilitation; D006801:Humans; D008960:Models, Psychological