1. Cangzhou Clinical College of Integrated Traditional Chinese and Western Medicine of Hebei Medical University, China
2. Department of General Surgery, Cangzhou People’s Hospital, China
3. Department of General Surgery, Gucheng County People’s Hospital, China
4. Department of General Surgery, Cangzhou Clinical College of Integrated Traditional Chinese and Western Medicine of Hebei Medical University, China
5. Department of Pathology, Cangzhou Clinical College of Integrated Traditional Chinese and Western Medicine of Hebei Medical University, China