AKDOĞAN, M., PARLAK, E., KAYHAN, B., BALK, M., ERSAVAŞTF, G., & ŞAHİN, B. (2003). Are serum and biliary carcinoembryonic antigen and carbohydrate antigen19-9 determinations reliable for differentiation between benign and malignant biliary disease?. Turkish Journal of Gastroenterology, 14(3), 181–184. Retrieved from https://www.turkjgastroenterol.org/index.php/tjg/article/view/1265