1. The Third Department of General Surgery, People’s Hospital of China Medical University (Liaoning Provincial People’s Hospital), Shenyang, China
2. Department of General Surgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
3. Department of Day Surgery Ward, The First Affiliated Hospital of Harbin Medical University, Harbin, China
4. Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China