. 2020 Dec 7;7:538815. doi: 10.3389/fmed.2020.538815
Copyright © 2020 Li, Zhao, Qie, Zhang, Li, Lin, Guo, You, An, Liu, Zhang, Bi, Hong, Chang, He, Hua, Zhou, Liao, Wang, Wang, Li and Wei.
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Figure 1.
Comparison of overall survival in the COP and TOP groups.