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Kaplan-Meier survival distribution function estimates of time to local failure for dogs in the high thermal dose group. Total heating duration was divided into thirds for the analysis (n=21 dogs each curve). The longest heating duration is associated with shorter duration of tumor control. The number of local recurrences was 8, 9, and 11 while the median time to local failure was 2.8, 2.0 and 1.1 years for the three heating duration groups in increasing order, respectively.
