1. Department of Digestive Diseases of Huashan Hospital, Fudan University, Shanghai, China
2. Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, PA, USA
3. Institutes of Biomedical Sciences of Shanghai Medical School, Fudan University, Shanghai, China
4. Department of Laboratory Medicine of Huashan Hospital, Fudan University, Shanghai, China
5. Department of Immunology, Shanghai Medical College, Fudan University, Shanghai, China