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. 2019 Mar 25;17:98. doi: 10.1186/s12967-019-1841-3

Fig. 2.

Fig. 2

Calibration curve of the nomogram in the primary and validation cohort, with the x-axes are actual survival estimated by the nomogram, the y-axes are observed survival calculated by the Kaplan–Meier method. a Three-year OS in the primary cohort. b Five-year survival OS in the primary cohort. c Three-year OS in the validation cohort