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Construction and evaluation of the nomogram. (A). Nomogram for predicting the prognosis of patients with osteosarcoma. (B) Calibration for 3-and 5-year OS in the training cohort. (C) Calibration for 3-and 5-year OS in the verification cohort. (D) ROC analysis for 3-and 5-year OS in the training cohort. (E) ROC analysis for 3-and 5-year OS in the verification cohort.
