1. Department of Geriatric, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, P. R. China
2. Department of Thoracic Surgery, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, P. R. China
3. Department of Pharmacology, Jinzhou Medical University, Liaoning, P. R. China
4. Outpatient Department, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, P. R. China
5. Key laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Gastrointestinal Surgery IV, Peking University Cancer Hospital and Institute, Beijing, P. R. China.