Ahmed, A.; Shahriar, S.; Shimu, F.; Alam, S. S. U.; Sarker, R. D. Prognostic Relevance of Significantly Raised CA 19-9 With Choledocholithiasis to Malignant Pathologies of HBS: An Early Experience in Dept. Of Hepatobiliary Surgery at ShSMCH, Dhaka. J Shaheed Suhrawardy Med Coll 2020, 11, 119-123.