MP43-17 PREDICTING TRUE PATHOLOGIC GLEASON GRADE DURING ACTIVE SURVEILLANCE FOR PROSTATE CANCER: CALIBRATION OF THE JOHNS HOPKINS ACTIVECARE MODEL IN FIVE LARGE ACTIVE SURVEILLANCE COHORTS. (1st May 2022) - Pavlovich, Christian; Nieboer, Daan; Mamawala, Mufaddal; Nishimura, Akihiko; Landis, Patricia; Macura, Katarzyna; Epstein, Jonathan; Helleman, Jozien; Trock, Bruce; ,