1. Department of Gastrointestinal Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
2. Department of Hematology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
3. Department of Pathology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China