Al-dujaili, Amar H., Wafaa F. Al-Taei, Kisma M Turky, and Gheid H. Al-Ubaidi. “Comparative Study of CA19-9 Levels As Tumor Marker in Sera and Tissues of Patients With Stomach, Colon and Rectum Cancers”. Journal of the Faculty of Medicine Baghdad 51, no. 2 (July 1, 2009): 223–226. Accessed May 3, 2024. https://iqjmc.uobaghdad.edu.iq/index.php/19JFacMedBaghdad36/article/view/1218.