1. Department of Gastroenterology, Huadong Hospital, Shanghai Medical College Fudan University, Shanghai, China
2. Department of Respiration, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
3. Department of Cardiology, Huadong Hospital, Shanghai Medical College Fudan University, Shanghai, China
4. Department of Hematology, Huadong Hospital, Shanghai Medical College Fudan University, Shanghai, China
5. Department of Endoscopy Center, Huadong Hospital, Shanghai Medical College Fudan University, Shanghai, China
6. Department of General Practice, Huadong Hospital, Shanghai Medical College Fudan University, Shanghai, China