1. Department of Oncology, The Jiangyin Clinical College of Xuzhou Medical University, Wuxi, Jiangsu 214400, P.R. China
2. Department of Oncology, Nantong Tumor Hospital, Nantong, Jiangsu 226001, P.R. China
3. Department of Gastroenterology, The Jiangyin Clinical College of XuZhou Medical University, Wuxi, Jiangsu 214400, P.R. China
4. Central Laboratory, The Jiangyin Clinical College of XuZhou Medical University, Wuxi, Jiangsu 214400, P.R. China