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This work was supported by National Natural Science Foundation of China (Grant Nos. 61401165, 61302095, 61422105, 61531011), in part by Natural Science Foundation of Fujian Province of China (Grant Nos. 2015J01262, 2014J01243), and in part by Promotion Program for Young and Middleaged Teacher in Science and Technology Research of Huaqiao University (Grant No. ZQN-PY407).
The authors declare that they have no conflict of interest.
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Zhao, R., Lin, H., He, Y. et al. Impacts of outdated CSI for secure cooperative systems with opportunistic relay selection. Sci. China Inf. Sci. 60, 069303 (2017). https://doi.org/10.1007/s11432-015-0942-8