1. Clinical Medical College Chengdu Medical College Chengdu P. R. China
2. Department of Gastroenterology Clinical Medical College, The First Affiliated Hospital of Chengdu Medical College Chengdu P. R. China
3. Oncology Department Pengzhou People's Hospital Chengdu P. R. China
4. Oncology Department The First Affiliated Hospital of Chengdu Medical College Chengdu P. R. China