Designing a data retrieval program for clinical investigation.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001168:Arthritis / Q000453:epidemiology; D005260:Female; D006801:Humans; D007256:Information Systems; D008297:Male; D008722:Methods; D008875:Middle Aged; D009518:New York; D011676:Punched-Card Systems