Table 1.

Main characteristics of the microarray data sets used

Dataset	Original ref.	Genes	Patients	Classes
Leukaemia	[44]	3051	38	2
Breast	[9]	4869	78	2
Breast	[9]	4869	96	3
NCI 60	[61]	5244	61	8
Adenocarcinoma	[62]	9868	76	2
Brain	[63]	5597	42	5
Colon	[64]	2000	62	2
Lymphoma	[65]	4026	62	3
Prostate	[66]	6033	102	2
Srbct	[67]	2308	63	4