HCFA's data quality studies.
D014487:Centers for Medicare and Medicaid Services, U.S. / Q000458:organization & administration*; D007256:Information Systems / Q000592:standards*; D008499:Medical Records / Q000592:standards*; D011786:Quality Control; D014481:United States; D014483:United States Dept. of Health and Human Services / Q000458:organization & administration*