1. Department of Gastroenterology and Hepatology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou, China;
2. Department of Gastroenterology and Hepatology, the First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China;
3. Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong Higher Education Institutes of Sun Yat-Sen University, Guangzhou, China;
4. Department of Pediatrics, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou, China