1. Department of Ultrasound, Institute of Cancer and Basic Medicine, Cancer Hospital of the University of Chinese Academy of Sciences; Zhejiang Cancer Hospital, Hangzhou 310022, Zhejiang, China
2. Department of gastric surgery, Institute of Cancer and Basic Medicine, Cancer Hospital of the University of Chinese Academy of Sciences; Zhejiang Cancer Hospital, Hangzhou 310022, Zhejiang, China
3. Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou 310000, Zhejiang, China