Overuse of administrative data to measure underuse of care.
Woolf
S H
SH
Rothemich
S F
SF
D000368:Aged; D006300:Health Services Misuse / Q000706:statistics & numerical data*; D006299:Health Services for the Aged / Q000706:statistics & numerical data*; D006801:Humans; D006278:Medicare / Q000706:statistics & numerical data*; D020380:Needs Assessment; D014481:United States