Whitcomb, David, et al. “3. SMART Medical Review: CA 19-9 and Pancreatic Ductal Adenocarcinoma (PDAC).: CA 19-9 and Pancreatic Cancer”. SMART-MD Journal of Precision Medicine, vol. 1, no. 1, July 2024, pp. 14-27, https://doi.org/10.69734/psc3br75.