title: In dance scene drug surveys the sampling matters: comments on Riley et al.
authors.forename: N
authors.initials: N
authors.lastname: McKeganey
mesh_terms: D003615:Dancing; D016021:Epidemiologic Studies; D006801:Humans; D012107:Research Design; D015983:Selection Bias; D019966:Substance-Related Disorders / Q000453:epidemiology*