Table 1.

The detailed information of Gene expression datasets

Datasets	Data source	Number of genes	Number of majority class	Number of minority class	Class imbalance ratio (%)
GSE25066	GEO	13236	389	99	59.43
GSE20194	GEO	22284	222	56	59.71
BRCA	TCGA	20097	422	141	49.91
Liver24	TCGA	11885	371	50	76.25