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Validation of the nomogram's test set. A: Receiver operating characteristic curves for 1-, 3- and 5-year overall survival (OS) in the test set; B: Calibration curves for 1-, 3- and 5-year OS in the test set; C: Decision curves of the nomogram for predicting 1-, 3- and 5-year OS in the test set. AUC: Area under the receiver operating characteristic curve; OS: Overall survival; TP: True positive rate; FP: False positive rate.
