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XW Xiaoqiang Wang
YL Yiran Li
YS Yumiao Shi
JL Jiamei Luo
YZ Yiqi Zhang
ZP Zhiying Pan
FW Feixiang Wu
JT Jie Tian
WY Weifeng Yu
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Statistical analyses were completed using IBM SPSS Statistics 23.0 (SPSS Inc., Armonk, NY, United States). Quantitative data are presented as the mean ± SD, and categorical variables are presented as frequency (n) or proportion (%). Differences between the two groups were analyzed with an independent samples/paired Student’s t-test. Categorical variables were compared using the χ 2 test with the Yates correction or Fisher’s exact test. Survival curves were created using Kaplan–Meier survival analysis with a log-rank t-test. All the statistical tests were two sided with p values < 0.05 being considered statistically significant.

Copyright and License information:  ©2022 Wang, Li, Shi, Luo, Zhang, Pan, Wu, Tian and Yu.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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