KLK3 and Familial prostate cancer: Walz Walz J J Haese Haese A A Scattoni Scattoni V V Percent free prostate-specific antigen (PSA) is an accurate predictor of prostate cancer risk in men with serum PSA 2.5 ng/mL and lower Percent free prostate-specific antigen (PSA) is an accurate predictor of prostate cancer risk in men with serum PSA 2.5 ng/mL and lower Cancer Cancer 2008 2008 113 113 10 10 2695 2695 2703 2703 10.1002/cncr.23885 10.1002/cncr.23885 supplied-pmid 18853417?