Table 5.

(Continued)

Abbreviations: 5-FU, 5-fluorouracil; AREG, amphiregulin; COX-2, cyclo-oxygenase 2; CRC, colorectal cancer; DS, direct sequencing; ELISA, enzyme-linked immunosorbent assay; EGFR, epidermal growth factor receptor; EREG, epiregulin; FISH, fluorescent in situ hybridization; IHC, immunohistochemistry; MA, microassay; mAb, monoclonal antibody; MAPK, mitogen-activated protein kinase; mCRC, metastatic colorectal cancer; MSI, microsatellite instability; OS, overall survival; P, prospective; PCR-LCR, polymerase chain reaction-ligase chain reaction; PCR-RFLP, polymerase chain reaction-restriction fraction length polymorphism; PFS, progression-free survival; PI3KCA, phosphatidylinositol 3-kinase α catalytic subunit; PTEN, phosphatase and tensin homolog; qPCR, quantitative polymerase chain reaction; R, retrospective; RTPCR, reverse transcriptase polymerase chain reaction.