title: Clarifying issues related to testing for drug use.
authors.forename: S
authors.initials: S
authors.lastname: Marcell
mesh_terms: D015200:Fluoroimmunoassay; D007124:Immunoenzyme Techniques; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011863:Radioimmunoassay
chemical_list: D004364:Pharmaceutical Preparations