The Oxford Record Linkage Study as a medical information system.
D002908:Chronic Disease; D003201:Computers; D004358:Drug Therapy; D004739:England; D004813:Epidemiology; D006760:Hospitalization; D006769:Hospitals, General; D006801:Humans; D007256:Information Systems; D008499:Medical Records; D001523:Mental Disorders / Q000453:epidemiology; D009017:Morbidity; D009026:Mortality