Serum prostate-specific antigen levels (PSA) in men without clinical evidence of prostate cancer: age-specific reference ranges for total PSA, free PSA, and percent free PSA☆
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☆ This investigation was supported by grant DK-51345 awarded by the National Institute of Diabetes and Digestive and Kidney Diseases.
PII: S0090-4295(99)00349-0
© 1999 Elsevier Science Inc. All rights reserved.
