AL-saady, Rana. K., Wafa. F. AL-Tai, and Taqi A. Himdan. 2012. “Determination of Cancer Antigen CA15-3 and Carcino Embryonic Antigen CEA Concentration As Tumor Markers in Patients With Stomach and Colorectal Cancers”. Journal of the Faculty of Medicine Baghdad 54 (3): 256-58. https://doi.org/10.32007/jfacmedbagdad.543734.