Lymph Node Ratio, Perineural Invasion and R1 Resection as Independent Prognostic Factors in Pancreatic Adenocarcinoma: A Retrospective Cohort Study

1. Di Martino, M.
2. Ielpo, B.
3. de Nova, J.L.M.
4. Muñoz, E.A.
5. Santamaria, C.
6. Diago, V.
7. Martín-Pérez, E.