1. School of Medicine, Nanjing University, Department of Surgery, Jinling Hospital, Nanjing, China
2. Center for the Study of Inflammatory Bowel Diseaes, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
3. General Surgery Center of Jilin University, Changchun, China
4. School of Medicine, Nanjing University, Department of Pathology, Jinling Hospital, Nanjing, China