title: Frequency ratio method for differential diagnosis.
mesh_terms: D000368:Aged; D001554:Benzene / Q000506:poisoning; D002543:Cerebral Hemorrhage / Q000175:diagnosis; D003933:Diagnosis; D003937:Diagnosis, Differential; D004938:Esophageal Neoplasms / Q000175:diagnosis; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D011336:Probability
chemical_list: D001554:Benzene