Finally, we tested by meta-analysis, whether the individual gene expression of ABCA1 was associated with death in 1073 CRC patients of stages from I to IV, using six gene expression datasets from GEO repository database (GSE12945, GSE16125, GSE17536, GSE17537, GSE39582, GSE41258) (Figure 1A), for which OS information was available. Here, ABCA1 is linked to colorectal carcinoma.