<qa>  What is the mean of the values of the proportion of residual tumor defined as?We propose that the difference between the mean pre-op tumor volumes and the post-op ablated volumes VO and V1, respectively is zero. Residual tumor is defined as V0-V1. This will be determined by calculating the mean of the values of the proportion of residual tumor, defined as V0-V1 V0. Use of the proportion normalizes the data for different sized tumors. 