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  1. New Adjunctive Testing Strategies - Prostate-Specific Antigen-Based Screening for Prostate Cancer: A Systematic ... 
    https://www.ncbi.nlm.nih.gov/books/NBK518885
    ... that, compared to the PCPT risk calculator, the 4Kscore improved the area under the curve (AUC) from 0.74 to 0.82. 58 Prostate Health Index (PHI) The PHI is a blood test combining total PSA, free PSA and p2PSA (a ...