1. Department of Gastroenterology, Ruijin Hospital North Shanghai Jiaotong University School of Medicine Shanghai China
2. Department of Pathogenic Biology Bengbu Medical College Bengbu China
3. Anhui Key Laboratory of Infection and Immunity Bengbu Medical College Bengbu China
4. Laboratory Center for Morphology Bengbu Medical College Bengbu China
5. Department of Geriatrics, Ruijin Hospital North Shanghai Jiaotong University School of Medicine Shanghai China