Table 2. Batch information of the Iconix data set.

	Non liver tumor	Liver tumor	Control	Hybridization date
Training
B1	17	24	24	11/6/01–12/10/01
B2	87	17	56	12/11/01–02/25/02
B3	39	32	30	3/20/02–7/18/02
Test
B4	91	18	82	07/22/02–12/4/02
B5	53	39	95	4/3/03–9/28/04