1. State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
2. Department of Oncology and The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
3. Department of Orthopedic Oncology, Tangdu Hospital of Fourth Military Medical University, Xi'an 710038, Shaanxi Province, People's Republic of China
4. Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
5. Department of Gastroenterology, the Fifth Hospital of the People's Liberation Army, Yinchuan 750000, Ningxia Province, People's Republic of China
6. State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an 710032, People's Republic of China