Figure 1
From: Prognostic value of normal levels of preoperative tumor markers in colorectal cancer
Flowchart of the CRC patients with training and validation datasets. CRC, Colorectal cancer; CEA, carcinoembryonic antigen; CA19-9, carbohydrate antigen 19-9; CA125, carbohydrate antigen 125; AFP, alpha-fetoprotein.
