EGFR and colorectal cancer: The efficiency of SWCNTs conjugated with antibody C225, which could bind specifically with over-expressed EGFR in colorectal cancer cells and a chemotherapeutic drug called 7-Ethyl-10-hydroxy-camptothecin (SN38) was evaluated in three different colorectal cancer cell lines: HCT116, HT29 and SW620.