1. School of Clinical Medicine, North China University of Science and Technology, Tangshan, Hebei 063200, P.R. China
2. Department of Medical Molecular Diagnosis, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
3. Department of Pathology, Luanzhou City People's Hospital, Tangshan, Hebei 063004, P.R. China
4. Second Department of Radiotherapy and Chemotherapy, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
5. Department of Gastrointestinal Surgery, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China
6. Hebei Province Key Laboratory of Molecular Oncology, Tangshan People's Hospital, Tangshan, Hebei 063001, P.R. China