Table 1. List of datasets uploaded to GXB.

Dataset	Platforms	Diseases	Number of samples	GEO ID	References
Bordet Radcliffe NUH dataset - GSE45255.GPL96	Affymetrix Human Genome U133A Array	Mixed Breast Cancer Types	139	GSE45255	( Nagalla et al., 2013)
Erasmus Medical Center (EMC) dataset 1 - GSE2034.GPL96	Affymetrix Human Genome U133A Array	Lymph Node Negative Breast Cancer	286	GSE2034	( Wang et al., 2005)
Erasmus Medical Center (EMC) dataset 2 - GSE5327.GPL96	Affymetrix Human Genome U133A Array	Lymph Node Negative Breast Cancer	58	GSE5327	( Minn et al., 2007)
Europe and Cleveland (EMCT) dataset - GSE12093.GPL96	Affymetrix Human Genome U133A Array	ER + Breast Cancer	136	GSE12093	( Zhang et al., 2009)
Guy's hospital dataset (GUYT2) - GSE9195.GPL570.fCEL	Affymetrix Human Genome U133 Plus 2.0 Array	ER+ Breast Cancer	77	GSE9195	( Loi et al., 2008)
Johannes Gutenberg University (MAINZ) dataset - GSE11121.GPL96	Affymetrix Human Genome U133A Array	LN- Breast Cancer	200	GSE11121	( Schmidt et al., 2008)
Karolinska (STO) dataset - +GPL97	Affymetrix Human Genome U133A Array & Affymetrix Human Genome U133B Array	Mixed Breast Cancer Types	159	GSE1456	( Pawitan et al., 2005)
Memorial Sloan-Kettering Cancer Center (MSKCC) dataset - GSE2603.GPL96_Clinical samples	Affymetrix Human Genome U133A Array	Mixed Breast Cancer Types	99	GSE2603	( Minn et al., 2005)
Nagalla 2013 reconstituted public dataset	Affymetrix Human Genome U133A Array & Affymetrix Human Genome U133A2 Array & Affymetrix Human Genome U133 Plus 2.0 Array	Mixed Breast Cancer Types	1839	multiple	( Nagalla et al., 2013)
Guys hospital (GUYT) dataset - GSE6532.GPL570	Affymetrix Human Genome U133 Plus 2.0 Array	ER+ Breast Cancer	87	GSE6532	( Loi et al., 2007)
John Radcliff Hospital (OXFU, OXFT) dataset - GSE6532.GPL96 +GPL97	Affymetrix Human Genome U133A & U133B Array	ER+ Breast Cancer	327	GSE6532	( Loi et al., 2007)
TRANSBIG (TBIG) dataset - GSE7390.GPL96	Affymetrix Human Genome U133A Array	Lymph Node Negative Breast Cancer	198	GSE7390	( Desmedt et al., 2007)
University of California San Francisco (YAU) dataset - GSE7378.GPL4685	Affymetrix GeneChip HT-HG_U133A Early Access Array	ER+ Breast Cancer	54	GSE7378	( Zhou et al., 2007)
Uppsala and Singapore dataset - GSE4922.GPL96 +GPL97	Affymetrix Human Genome U133A & U133B Array	Mixed Breast Cancer Types	289	GSE4922	( Ivshina et al., 2006)