Natural history of undifferentiated pleomorphic sarcoma: Experience from the US Sarcoma Collaborative

Eleftherios A. Makris, Thuy B. Tran, Daniel J. Delitto, Byrne Lee, Cecilia G. Ethun, Valerie Grignol, J. Harrison Howard, Meena Bedi, T. Clark Gamblin, Jennifer Tseng, Kevin K. Roggin, Konstantinos Chouliaras, Konstantinos Votanopoulos, Darren Cullinan, Ryan C. Fields, Kenneth Cardona, George Poultsides, Amanda Kirane