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Incidence of grade 1 or 2 late gastrointestinal toxicity according to rectum V70. The 24-month actuarial rate of grade 1 or 2 late gastrointestinal toxicity was 11.1% if V70 was 3% or lower and 26.1% if V70 was higher than 3% (P=0.149 on univariate and P=0.032 on multivariate analysis).
