title: Preemployment drug screening: the epidemiologic issues.
authors.forename: M
authors.initials: M
authors.lastname: Upfal
authors.forename: K W
authors.initials: KW
authors.lastname: Peterson
mesh_terms: D006801:Humans; D007586:Job Application; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D015813:Substance Abuse Detection