KLK3 and neoplasm: Low risk was defined as PSA < 10 ng/ml, Gleason score < 6, and tumour T1-T2a; intermediate risk as PSA 10–20 ng/ml, and/or Gleason score 7, and/or T2b; and high risk as PSA > 20 ng/ml and/or Gleason score 8–10 and/or > T2c.