Comparison of Carcinoembryonic Antigen Serum Levels in Colorectal Cancer Patients with Different Histopathological Grades. MKB [Internet]. 2020 Jun. 30 [cited 2026 Jul. 6];52(2):87-91. Available from: https://beta.unpadmedjournals.id/index.php/mkb/article/view/1950