An open-labeled, randomized, multicenter phase II a study of gambogic acid injection for advanced malignant tumors - Chi, Y; Zhan, X K; Yu, H; Xie, G R; Wang, Z Z; Xiao, W; Wang, Y G; Xiong, F X; Hu, J F; Yang, L; Cui, C X; Wang, J W (Chin Med J (Engl), 2013)