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While initially\naimed at modeling the most advanced stage of prostate cancer,\nmetastatic Castration-Resistant Prostate Cancer (mCRPC), the\nmodeling framework has subsequently been extended to cover also\nthe non-metastatic form of advanced prostate cancer (CRPC).\nReadily fitted ensemble-based model S4-objects are provided,\nand a simulated example dataset based on a real-life cohort is\nprovided from the Turku University Hospital, to illustrate the\nuse of the package. Functionality of the ePCR methodology\nrelies on constructing ensembles of strata in patient cohorts\nand averaging over them, with each ensemble member consisting\nof a highly optimized penalized/regularized Cox regression\nmodel. 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