1 Inner Mongolia Medical University, Huhehot North Street, Inner Mongolia, 010050, China.
2 Inner Mongolia Medical University, Department of Gastrointestinal Surgery, Affiliated Hospital of Inner Mongolia Medical University, Huhehot North Street, Inner Mongolia, 010050, China. Electronic address: wuxinlin@126.com.
3 Inner Mongolia Medical University, Department of Gastrointestinal Surgery, Affiliated Hospital of Inner Mongolia Medical University, Huhehot North Street, Inner Mongolia, 010050, China.