Ya-Dong Wang1, Xin-Dong Qu1, Wei Wang2. 1. Department of Thoracic Surgery, Liaocheng People's Hospital and Clinical School of Taishan Medical University, Liaocheng, 252000, People's Republic of China. 2. Department of Thoracic Surgery, Liaocheng People's Hospital and Clinical School of Taishan Medical University, Liaocheng, 252000, People's Republic of China. 305133680@qq.com.