Long-Term Outcomes According to Surgical Margin in Mass-Forming Cholangiocarcinoma: The Role of R1vasc: Long-Term Outcomes according to Surgical Margin in Mass-Forming Cholangiocarcinoma… - Milana, Flavio; Procopio, Fabio; Calafiore, Eleonora; Famularo, Simone; Costa, Guido; Galvanin, Jacopo; Branciforte, Bruno; Torzilli, Guido (Annals of Surgical Oncology, 2025)