1 Department of Gastroenterology, National Clinical Research Center for Child Health and Disorders; Ministry of Education Key Laboratory of Child Development and Disorders; China International Science and Technology Cooperation Base of Child Development and Critical Disorders; Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No. 136, 2nd Zhongshan Road, Yuzhong District, Chongqing, People's Republic of China.
2 Department of Gastroenterology, National Clinical Research Center for Child Health and Disorders; Ministry of Education Key Laboratory of Child Development and Disorders; China International Science and Technology Cooperation Base of Child Development and Critical Disorders; Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No. 136, 2nd Zhongshan Road, Yuzhong District, Chongqing, People's Republic of China. lizhongyue1001@hotmail.com.