title: Is the Watson-Schwartz screening method for porphobilinogen reliable?
authors.forename: J E
authors.initials: JE
authors.lastname: Buttery
mesh_terms: D006801:Humans; D008403:Mass Screening / Q000379:methods* / Q000706:statistics & numerical data; D011162:Porphobilinogen / Q000652:urine*; D011164:Porphyrias / Q000652:urine*
chemical_list: D011162:Porphobilinogen