1. Department of Pediatrics, Jiaozuo Women and Children Hospital, Jiaozuo, China
2. Department of Gastroenterology, The Shanghai Tenth People’s Hospital of Tongji University, Shanghai, China
3. Department of Gastroenterology, The Shanghai Tenth People’s Hospital of Tongji University, No. 301 Yanchang Road, Shanghai, 200072, China
4. Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, 450014, China