1 The Second Department of General Surgery, The 4th Hospital of Hebei Medical University, No. 12 Jiankang Road, Shijiazhuang, Hebei, China.
2 Department of General Surgery, Shijiazhuang Hospital of Traditional Chinese Medicine, Shijiazhuang, 050011, China.
3 School of Basic Medicine, Fourth Military Medical University, 169 Changle West Rd, Xi'an, 710032, China. Electronic address: tian@fmmu.edu.cn.
4 General Surgery, The 2nd Hospital of Hebei Medical University, 215 Heping Road, Shijiazhuang, Hebei, China. Electronic address: wangguiying@hebmu.edu.cn.