1. Endoscopy Center and Endoscopy Research Institute, Zhongshan Hospital, Fudan University, Shanghai, China
2. Department of Pediatric Surgery, Shanghai Children’s Hospital, Shanghai Jiao Tong University, Shanghai, China
3. Department of Gastroenterology, Hepatology and Nutrition, Shanghai Children’s Hospital, Shanghai Jiao Tong University, Shanghai, China
4. Department of Gastroenterology, Fujian Healthcare Hospital for Women and Children, Fuzhou, China
5. Department of Gastroenterology, The Children’s Hospital of Xi’an City, Xi’an, China