27 samples were used, with genome-wide methylation profiling from Illumina HumanMethylation450 BeadChip platform (34 (link)). Probe to gene conversion was done the same way as for TCGA HCC methylation data.
All the available clinical information for the confirmation cohorts is listed in Supplementary Table S1. These cohorts were used to test the Support Vector machine (SVM) machine-learning models.