Meral AKDOĞAN, Erkan PARLAK, Burçak KAYHAN, Mevhibe BALK, Gül ERSAVAŞTF, and Burhan ŞAHİN. “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, no. 3 (July 25, 2019): 181–184. Accessed July 20, 2025. https://tjg.avesjournals.com/index.php/tjg/article/view/1857.