1. Department of Oncology, The Hospital Affiliated to Medical School of Yangzhou University (Taizhou People's Hospital), Taizhou, Jiangsu 225300, P.R. China
2. Department of Anus and Intestine Surgery, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
3. Department of Oncology, Liaocheng Dongchangfu People's Hospital, Liaocheng, Shandong 252000, P.R. China
4. Department of Radiotherapy, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
5. Department of Clinical Laboratory, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China