1. Department of Gastric Surgery; Fujian Medical University Union Hospital; Fuzhou China
2. Department of General Surgery; Fujian Medical University Union Hospital; Fuzhou China
3. Key Laboratory of Ministry of Education of Gastrointestinal Cancer; Fujian Medical University; Fuzhou China
4. Fujian Key Laboratory of Tumor Microbiology; Fujian Medical University; Fuzhou China
5. Department of Epidemiology and Health Statistics; Fujian Medical University; Fuzhou China