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Meral AKDOĞAN; Erkan PARLAK; Burçak KAYHAN; Mevhibe BALK; Gül ERSAVAŞTF; 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 2019, 14, 181-184.