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. 2017 May 26;8(33):55478–55488. doi: 10.18632/oncotarget.18233

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Copyright: © 2017 Dong et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License 3.0 (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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HR: hazard ratio; RR: relative risk; CI: confidence interval. (A) Association between metformin effect and overall survival at 6 months; (B) Association between metformin effect and overall survival; (C) Association between metformin effect and progression-free survival.