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Patients characteristics
RT, radiotherapy; CEA, carcino-embryonic antigen; WD, well-differentiated; MD, moderate differentiated; PD, poorly differentiated; 5-fluorouracil, 5-FU; FL, 5-FU and leucovorin; FOLFOX, oxaliplatin, leucovorin, and 5-FU; FOLFIRI, irinotecan, leucovorin, and 5-FU.
