Y. Homma, K. Miyake, Y. Kikuchi, Y. Yabushita, R. Matsuyama, and I. Endo, “Prognostic Significance of Post-Neoadjuvant Chemotherapy Carbohydrate Antigen 19-9 Levels in Patients With Resectable Pancreatic Cancer Treated With S-1 and Gemcitabine: A Retrospective Cohort Study”, World J Oncol, vol. 16, no. 3, pp. 269–275, Jun. 2025, doi: 10.14740/wjon2563.