Squires MH, Ethun CG, Donahue EE, Benbow JH, Anderson CJ, Jagosky MH, Salo JC, Hill JS, Ahrens W, Prabhu RS, Livingston MB, Gower NL, Needham M, Trufan SJ, Fields RC, Krasnick BA, Bedi M, Abbott DE, Schwartz P, Votanopoulos K, Chouliaras K, Grignol V, Roggin KK, Tseng J, Poultsides G, Tran TB, Cardona K, Howard JH. A multi-institutional validation study of prognostic nomograms for retroperitoneal sarcoma. J Surg Oncol. 2021 Oct; 124(5):829-837.