A. Note that pre-operatively there were no differences in reactivity between the Tol and non-Tol groups (with ESRD) versus normal laboratory volunteers (Patient #8 was still considered tolerant since the assays were performed between 3 and 5 years post-operatively (see Table 1 and Figure 3B). The pre-operative samples analyzed included patient #2, #5, #6, #9, #11, and #13 in the Tol group. The non-Tol group included #1, #3, #4, #8, #10, #12, #16, and #18. B. Note that there was no difference between the Tol and non-Tol groups post-operatively with each group having significantly lower responses than normal laboratory volunteers (*, p=0.03 and 0.02, at the base of the figure). This was despite all Tol recipients being IS-free for over one year. In the Tol group, the assays were performed on patient #2, #6, #9, #11, and #13. In the non-Tol group the assays were performed on patients #1, #3, #4, #8, and #12, all on IS for greater than one year. A log scale was used to emphasize the tetanus response differences vs normals.