Fig. 4

Construction of PTG signatures. A The hazard ratio of 116 candidate prognostic genes in the Asian Cancer Research Group (ACRG) cohort. B The most robust predictive genes were identified by the least absolute shrinkage and selection operator (LASSO) Cox regression algorithm. C An ensemble of four genes remained with non-zero LASSO Cox coefficients. PTG, PDTX-tumorigenicity-related gene