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1文献类型治疗2证据水平1b3文献来源Jung-Hee lee, Je-Hwan lee, Jin-Hee Ahn, et al.Randomized trial of postoperative adjuvant therapy in stage Ⅱ and Ⅲ rectal cancer to define the optimal sequence of chemotherapy and radiotherapy: a preliminary report [J]. J Clin Oncol, 20: