Table 1. Details of the GEO datasets.

Reference	Sample	GEO	Platform	Normal	Tumor
Ambatipudi S et al. [2012]	oral	GSE23558	GPL6480	5	27
Reis PP et al. [2011]	oral	GSE31056	GPL10526	24	23
Chen C et al. [2008]	oral	GSE30784	GPL570	45	167
Ochs MF et al. [2013]	oral	GSE34496	GPL8786	25	44