1. Department of Pathology; Nanjing Drum Tower Hospital; Nanjing Jiangsu Province China
2. Department of Biostatistics; Nanjing Drum Tower Hospital; Nanjing Jiangsu Province China
3. Department of Gastroenterology; Nanjing Drum Tower Hospital; Nanjing Jiangsu Province China
4. Department of Medicine; Beth Israel Deaconess Medical Center; Boston USA
5. Department of Surgery; Veterans Affairs Boston Healthcare System and Harvard Medical School; West Roxbury MA USA
6. Department of Gastroenterology; Veterans Affairs Boston Healthcare System and Harvard Medical School; West Roxbury MA USA
7. Department of Pathology and Laboratory Medicine; Veterans Affairs Boston Healthcare System and Harvard Medical School; West Roxbury MA USA