Performance of nine-lncRNA prognostic signature in validation cohort: Time-dependent receiver operating characteristic curves of three prognostic models according to 1-year (A), 3-year (B) and 5-year (C) overall survival. (D) Calibration curve for 1-year overall survival; (E) Calibration curve for 3-year overall survival; (F) Calibration curve for 5-year overall survival.