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Clinical observation of raltitrexed as second-line chemotherapy for advanced colorectal cancer in elderly patients
Lai Lin,Hou Encun,Lu Yunxin,Tan Zhiwei,Wei Jialiang,Pan Xingchen
Chinese Journal of Oncology Prevention and Treatment . 2017, (5): 387 -390 .  DOI: 10.3969/j.issn.1674-5671.2017.05.11