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Kaplan-Meier estimate of (A) biochemical no evidence of disease rate and (B) prostate cancer specific-survival rate based on prostate-specific antigen nadir (nPSA) after high-dose-rate brachytherapy combined with external beam radiation therapy, respectively. Patients were divided into 2 groups according to levels of nPSA after radiotherapy: nPSA of ≤ 0.02 ng/ml (n = 196) and nPSA of > 0.02 ng/ml (n = 20)
