GEO	Paper	Cases
GSE17891    	Collisson et al., 2011	27 PDAC + 19 cell lines
GSE15471    	Badea et al., 2008	36 PDAC + 36 Normal-adjacent 
GSE16515    	Pei et al., 2009	36 PDAC + 16 Normal-adjacent
GSE32676    	Donahue et al., 2012	25 PDAC + 7 Non-malignant Pancreas
GSE2109	Expo project*	17 PDAC
--	ICGC project   	242 PDAC
--	TCGA project	178 PDAC