Study design and setting

SL San-Zhong Li
NS Ning Su
SW Shuang Wu
XF Xiao-Wei Fei
XH Xin He
JZ Jiu-Xiang Zhang
XW Xiao-Hui Wang
HZ Hao-Peng Zhang
XB Xiao-Guang Bai
GC Guang Cheng
ZF Zhou Fei
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In this study, we retrospectively analyzed surgical cases performed between June 2009 and June 2021 in Xijing Hospital. This study was in compliance with the Declaration of Helsinki and approved by the Research Ethics Committee of Xijing Hospital. Informed consent was signed by the patients or their legal representatives.

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