1. Department of Gastrointestinal Surgery, Affiliated Hospital of Jining Medical University, Jining, Shandong 272000, P.R. China
2. Department of Central Laboratory, Affiliated Hospital of Jining Medical University, Jining, Shandong 272000, P.R. China
3. Department of General Surgery Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui 230001, P.R. China
4. Department of Gastric Cancer Surgery, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
5. Department of Surgery, Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, P.R. China