1 Department of Gastrointestinal Surgery, Liaocheng People's Hospital and Clinical School of Taishan Medical University, Liaocheng, 252000, People's Republic of China.
2 Department of Gastrointestinal Surgery, Liaocheng People's Hospital and Clinical School of Taishan Medical University, Liaocheng, 252000, People's Republic of China. 312621750@qq.com.