Table 1.

Characteristic of individual studies retrieved from Gene Expression Omnibus for meta-analysis

Dataset	Samples	Case/Control	Country	PMID	Platforms	Gene#	Gene chip
GSE6008	103	99/4	USA	16,452,189/ 19,843,521/ 17,418,409/ 27538791	GPL96	13,909	Affymetrix Human Genome U133A Array
GSE18520	63	53/10	USA	19,962,670	GPL570	22,838	Affymetrix Human Genome U133 Plus 2.0 Array
GSE26712	195	185/10	USA	18,593,951/25944803	GPL96	13,909	Affymetrix Human Genome U133A Array
GSE27651	41	35/6	USA	21,451,362	GPL570	22,838	Affymetrix Human Genome U133 Plus 2.0 Array
GSE29450	20	10/10	USA	21,754,983	GPL570	22,838	Affymetrix Human Genome U133 Plus 2.0 Array
GSE36668	8	4/4	Norway	23,029,477	GPL570	22,838	Affymetrix Human Genome U133 Plus 2.0 Array
GSE52037	20	10/10	USA	24,666,724	GPL570	19,257	Affymetrix Human Genome U133 Plus 2.0 Array