Table 1. The data sets of DNA methylation.

Training data set	Na	ICCb	HCCc	Total
TCGA-CHOL	8	30	0	38
GSE32079 [20]	0	50	0	50
GSE49656 [21]	4	26	0	30
GSE60753 [22]	34	2	32	68
TCGA-LIHC	50	0	370	420
Total	96	108	402	606
Validation data set	N	ICC	HCC	Total
GSE89803 [23]	4	96	0	100
DS4-pumch [11]	10	0	10	20
GSE48325 [24]	18	0	0	18
GSE54503 [25]	66	0	66	132
GSE56588 [17]	10	0	224	234
GSE75041	0	0	66	66
GSE77269 [26]	20	0	20	40
GSE89852 [27]	37	0	37	74
GSE99036 [28]	0	0	15	15
GSE107038 [29]	40	0	0	40
GSE113017 [30]	29	0	29	58
GSE113019 [30]	18	0	37	55
Total	252	96	504	852

^aThe number of the normal samples.

^bThe number of the ICC samples.

^cThe number of the HCC samples.