1. Department of Pathology North China University of Science and Technology Affiliated Hospital Tangshan China
2. Central Laboratory of Clinical Medical College North China University of Science and Technology Affiliated Hospital Tangshan China
3. Department of GI Medicine General Hospital of Ningxia Medical University Yinchuan China
4. Department of Medical Jining Second People’s Hospital Jining China
5. Department of laboratory Jingbian County People’s Hospital Yulin China
6. Department of Medical Jining First People’s Hospital Jining China
7. Department of Gastrointestinal Surgery People’s Hospital of Ningxia Hui Autonomous Region Yinchuan Ningxia China
8. Department of Second Clinical College Shengjing Hospital Affiliated to China Medical University Shenyang, Liaoning China
9. Department of Pathology Ningxia Medical University Yinchuan China