In order to select a representative group of genes for qRT-PCR validation of differentially expressed genes between AA and EA CRC patients, we performed a 10-fold cross validation analysis that resulted in the selection of following ten genes: CRYBB2, PSPH, ADAL, VSIG10L, C17orf81, ANKRD36B, ZNF835, ARHGAP6, TRNT1 and WDR8. Here, PSPH is linked to colorectal carcinoma.