CD8A and tropical spastic paraparesis: We had the opportunity to obtain the CSF from 1 HLA-A*0201+ HAM/TSP patient (HAM-6) from which we could compare the TCR β clonally expanded repertoires of paired samples of Tax11-19–specific CD8+ T cells in PBMCs, total PBMCs, and total CSF cells (Figure 6A; left, middle, and right, respectively).