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Construction and performance of combined models. a Development of radiomics nomogram. The nomogram was constructed by combining the risk score, pN, and endocrine therapy. b, c The plots display the ROC curves of the combined model for 3 years and 5 years in the training and testing sets, respectively. d, e The plots show the calibration curves for 3 years and 5 years in the training and testing sets, respectively
