1. Division of Gastrointestinal Surgery Center the First Affiliated Hospital of Sun Yat‐sen University Guangzhou Guangdong 510080 P. R. China
2. Gastric Cancer Center Sun Yat‐sen University Guangzhou Guangdong 510080 P. R. China
3. Laboratory of Surgery the First Affiliated Hospital of Sun Yat‐sen University Guangzhou Guangdong 510080 P. R. China