1. Molecular Diagnosis and Gene Testing Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China
2. Department of Pathology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China
3. Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China
4. Department of Gastroenterology and Hepatology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, P. R. China
5. School of Medicine, Sun Yat-sen University, Guangzhou 510080, P. R. China
6. Department of Pathology, Guangzhou First People’s Hospital, Guangzhou 510180, P. R. China
7. Department of Dermatology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, P. R. China
8. Department of Pathology, Guangzhou Medical University Cancer Center, Guangzhou 510095, P. R. China
9. Department of Gastrointestinal Surgery, The First Affiliated Hospital of Sun Yat-sen University, 510080 Guangzhou, P. R. China