External validation of the Martini nomogram for prediction of side-specific extraprostatic extension of prostate cancer in patients undergoing robot-assisted radical prostatectomy

•The original model should not be used in clinical practice given the substantial underestimation of the predicted risk observed in this study.•The updated version of the model should not be used for individualized risk prediction, as miscalibration is still present and regards either over- or under...

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