title: Interpreting negative test results.
authors.affiliation: New England Medical Center, Boston.
authors.forename: J P
authors.initials: JP
authors.lastname: Kassirer
authors.forename: R I
authors.initials: RI
authors.lastname: Kopelman
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications* / Q000175:diagnosis / Q000209:etiology; D000328:Adult; D001927:Brain Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy; D003937:Diagnosis, Differential; D005188:False Negative Reactions; D005260:Female; D006679:HIV Seropositivity / Q000175:diagnosis; D006801:Humans; D007231:Infant, Newborn; D016030:Kidney Transplantation; D002955:Leucovorin / Q000627:therapeutic use; D008279:Magnetic Resonance Imaging; D011247:Pregnancy; D011739:Pyrimethamine / Q000627:therapeutic use; D013444:Sulfisoxazole / Q000627:therapeutic use; D014057:Tomography, X-Ray Computed; D014123:Toxoplasmosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000188:drug therapy
chemical_list: D013444:Sulfisoxazole; D002955:Leucovorin; D011739:Pyrimethamine