Drug utilization in office visits to primary care physicians: National Ambulatory Medical Care Survey, 1980.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003625:Data Collection; D004363:Drug Utilization; D005194:Family Practice; D006801:Humans; D008875:Middle Aged; D011320:Primary Health Care / Q000706:statistics & numerical data*; D014481:United States