ASO Author Reflections: Prognostic Role of Preoperative Duke Pancreatic Monoclonal Antigen Type 2 Values in Patients with Pancreatic Cancer: Focusing on the Usefulness in Patients with Normal CA19-9. - Shimizu Y; Sugiura T; Ashida R; Ohgi K; Yamada M; Otsuka S; Uesaka K (Annals of surgical oncology, 2023)