1. Department of General Surgery, Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, China
2. Department of General Surgery, 900th Hospital of Joint Logistics Support Force, Fuzhou, China
3. Graduate School, Qinghai University, Xining, China
4. Department of General Surgery, Dongfang Hospital of Xiamen university, School of Medicine, Xiamen University, Fuzhou, China.