1. Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, and Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang 110001, China
2. Department of Hematology, The Fourth Affiliated Hospital of China Medical University, Shenyang 110001, China
3. National Clinical Research Center for Digestive Diseases, Xi’an 110001, China