The objectives of this study is to determine the relative efficacy of: 5-FU, 5-FU+ Leucovorin, 5-FU+ Levamisole and 5-FU + leucovorin + levamisole with pelvic RT in the treatment of stages B-2 and C (TNM stage II and III) rectal cancer. End points used will include local recurrence rates, probability of distant metastases, disease free survival rates and overall survival.
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