Prognostic factors of primary resected retroperitoneal soft tissue sarcoma: Analysis from a single asian tertiary center and external validation of gronchi's nomogram

Yi Sheng Chou, Chun Yu Liu, Yen Hwa Chang, Kuang Liang King, Paul Chih Hsueh Chen, Chin Chen Pan, Shu Huei Shen, Yu Ming Liu, Alex T.L. Lin, Kuang Kuo Chen, Yi Ming Shyr, Rheun Chuan Lee, Ta Chung Chao, Muh Hwa Yang, Chung Huang Chan, Jie Yu You, Chueh Chuan Yen^*