title: The eye of the beholder: an important variable in addiction typologies.
mesh_terms: D000328:Adult; D000367:Age Factors; D004812:Epidemiologic Methods; D006801:Humans; D008875:Middle Aged; D008960:Models, Psychological; D012931:Social Environment; D012938:Social Perception; D012945:Social Values; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders; D014481:United States