1. General Surgery Department, The Second Affiliated Hospital, Soochow University, Suzhou, Jiangsu Province, China.
2. General Surgery Department, Affiliated Yixing Hospital of Jiangsu University, Jiangsu Province, China.
3. Immunology Department, School of Medicine, Soochow University, Suzhou, Jiangsu Province, China.
4. Gastroenterology Department, Affiliated Suzhou Hospital of Nanjing Medical University, Jiangsu Province, China.