1. The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
2. Department of Gastroenterology, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
3. Department of Nuclear Medicine, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
4. Key Laboratory of Gastroenterology of Zhejiang Province, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
5. Department of Pathology, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
6. Department of Vascular Surgery, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China