Spasovа Verica, Mire Spasov, and Hristijan Spasov. “CA 19-9 AND ITS SIGNIFICANCE IN DIAGNOSIS AND SCREENING OF COLORECTAL CANCER”. KNOWLEDGE - International Journal 76, no. 4 (June 3, 2026): 375–380. Accessed August 20, 2026. https://ojs.ikm.mk/index.php/kij/article/view/8327.