1 Department of Gastrointestinal Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang 110032, Liaoning Province, China.
2 Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun 130000, Jilin province, China.
3 Department of Gastrointestinal Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang 110032, Liaoning Province, China. [email protected].