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. Frontier in Medical and Health Research, [S. l.], v. 4, n. 3, p. 2473–2482, 2026. Disponível em: https://fmhr.net/index.php/fmhr/article/view/3452.. Acesso em: 8 nov. 2026.