Robot-assisted laparoscopic retroperitoneal leiomyosarcoma resection with inferior vena cava graft replacement: a case report - Cheng, Gong; Ruan, Hailong; Yang, Chao; Cao, Qi; Liang, Huageng; Yang, Xiong; Jiang, Guosong; Zhang, Xiaoping (Translational Andrology and Urology, 2021)