Multicenter phase II trial (SWOG S1609, cohort 51) of ipilimumab and nivolumab in metastatic or unresectable angiosarcoma: a substudy of dual anti-CTLA-4 and anti-PD-1 blockade in... oleh Howard Streicher, Elad Sharon, Razelle Kurzrock, Young Kwang Chae, Megan Othus, Edward Mayerson, Melissa Plets, Charles Blanke, Ashish Sangal, Benjamin Powers, Chung-Tsen Hsueh, Rashmi Chugh, Suresh Nair, Mark Agulnik, G Thomas Budd, Michael J Wagner, Sandip P Patel, Chris Ryan, Adrienne I Victor, Kirsten M Leu