Tumor Size Reduction and Serum Carbohydrate Antigen 19-9 Kinetics After Neoadjuvant FOLFIRINOX in Patients With Pancreatic Ductal Adenocarcinoma. - Servin-Rojas M; Fong ZV; Fernandez-Del Castillo C; Ferrone CR; Lee H; Lopez-Verdugo F; Qiao G; Rocha-Castellanos DM; Lillemoe KD; Qadan M (Surgery, 2024)