Expression of COL12A1, COL1A2, COL3A1, COL5A1, COL5A2, and COL6A3 in CRC tissues and normal tissues were acquired from Oncomine (https://www.oncomine.org) and the Human Protein Atlas (https://www.proteinatlas.org). Here, COL5A1 is linked to colorectal carcinoma.