1. Department of Endocrinology and Metabolism, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
2. Department of Microbiology and Center of Infectious Diseases, Peking University Health Science Center, Beijing, China
3. Postgraduate Training Base in The Third Medical Center of Chinese PLA General Hospital, Jinzhou Medical University, Jinzhou, Liaoning, China
4. School of Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei, China
5. Department of General Surgery, Peoples Hospital of Linxi County, Xingtai, Hebei, China
6. Department of General Surgery, Central Hospital of Xingtai County, Hebei, China
7. Department of General Surgery, The Fourth Affiliated Hospital of Hebei Medical University, Shijiazhuang, Hebei, China