1. Department of Gastroenterology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
2. Institute of Burns, Tongren Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
3. Department of Pediatric Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
4. Department of Physiology, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China