Carcinoembryonic antigen surge in metastatic colorectal cancer patients responding to irinotecan combination chemotherapy. - An, Xin; Ding, Pei-Rong; Xiang, Xiao-Juan; Wang, Zhi-Qiang; Wang, Feng-Hua; Feng, Fen; Jiang, Wen-Qi; He, You-Jian; Xu, Rui-Hua; Li, Yu-Hong (Biomarkers, 2010)