1. Department of Surgical Hebei Medical University Shijiazhuang Hebei Province China
2. Hebei North University Zhangjiakou China
3. Department of Hand & Foot Surgery First Hospital of Qinhuangdao Qinhuangdao China
4. Department of General Surgery First Hospital of Qinhuangdao Qinhuangdao China
5. School of Control Engineering, Northeastern University at Qinhuangdao Qinhuangdao China