1.
Silalahi EM, Zain LH, Effendi R. Serum carcinoembryonic antigen tends to decrease in poorly-differentiated colorectal cancer. Universa Medicina [Internet]. 2013 Dec. 7 [cited 2021 Aug. 2];32(3):165-71. Available from: https://univmed.org/ejurnal/index.php/medicina/article/view/90