Title: MP34-20 METASTASIS-FREE SURVIVAL (MFS) IN NONMETASTATIC CASTRATION-RESISTANT PROSTATE CANCER (NMCRPC) PATIENTS (PTS) WITH PROSTATE-SPECIFIC ANTIGEN (PSA) DECLINE TO < 0.2 NG/ML FOLLOWING APALUTAMIDE (APA) TREATMENT: POST HOC RESULTS FROM THE PHASE 3 SPARTAN STUDY