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DIAGNOSTIC ACCURACY OF PROSTATE-SPECIFIC ANTIGEN DENSITY, FREE-TO-TOTAL PSA RATIO, AND DIGITAL RECTAL EXAMINATION IN DETECTING PROSTATE CANCER AMONG MEN WITH SERUM PSA LEVELS IN THE GRAY ZONE (4–10 NG ML): A PROSPECTIVE OBSERVATIONAL STUDY. FMHR 2026, 4 (3), 2473-2482.