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1文献类型治疗2证据水平1b3文献来源Cutsem E V, Twelves C, Cassidy J, et al. Oral capecitabine compared with intravenous fluorouracil plus leucovorin in patients with metastatic colorectal cancer: result of a large phase Ⅲ study [J]. J Clin Onco, 2001,19(21),4097-4106