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Background The purpose of alpha-fetoprotein (AFP) and abdominal ultrasound (US) cannot be discerned in administrative data. Aim We developed an algorithm to identify AFP and US used as surveillance tests for hepatocellular carcinoma (HCC). Methods We evaluated 300 AFP and 301 US tests from a VA database. Surveillance predictors in the administrative files (diagnoses, labs) were examined in logistic...
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