Kaplan-Meier curves of the early RFS stratified by the GARSL and ERASL models. GARSL preoperative model (a), GARSL postoperative model (b), ERASL-pre model (c), ERASL-post model (d). ERASL, early recurrence after surgery for liver tumor; RFS, recurrence-free survival; GARSL, genetic algorithm for predicting recurrence after surgery of liver cancer.