1. Department of Gastroenterology and General Surgery, Sichuan Mianyang 404 Hospital , 621000 , Mianyang , Sichuan , China
2. Department of Pediatric Infectious Diseases, Sichuan Mianyang 404 Hospital , 621000 , Mianyang , China
3. Department of Gastroenterology and General Surgery, Sichuan Mianyang 404 Hospital , No. 56, Yuejin Street, Fucheng District, 621000 , Mianyang , Sichuan , China