1. Department of Pathology, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
2. Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
3. The Clinical Bio‑Bank, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226019, P.R. China
4. Department of Gastroenterology, Affiliated Xinghua People's Hospital of Yangzhou University Medical College, Xinghua, Jiangsu 225700, P.R. China
5. Department of Gastrointestinal Surgery, Affiliated Xinghua People's Hospital of Yangzhou University Medical College, Xinghua, Jiangsu 225700, P.R. China
6. Department of Pathology, Affiliated Xinghua People's Hospital of Yangzhou University Medical College, Xinghua, Jiangsu 225700, P.R. China
7. Department of Gastroenterology, Shanghai General Hospital, Nanjing Medical University, Shanghai 200080, P.R. China