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Stratified analysis of the relationship between high/low riskScore and RFS. Kaplan-Meier analyses for RFS in subgroups stratified by different conditions as follows: A-D. different etiologies, E-F. presence or absence of liver cirrhosis, G-H. different levels of serum AFP, I-J. different grade, K-L. stage, M-N. race, and O–P. family history.
